A Boolean flag that when set (Y) indicates that the textures that comprise a particular texture group, are stratified.
A character string that represents a member of a domain.  This value must be unique for every member of a given domain.
A character used to indicate that this horizon has an identical horizon designation as some overlying horizon.  The two horizons in question are separated by at least one other horizon.
A column's logical data type is its generic, software independent data type.  Since the SSURGO standard does not correspond to any specific database management system (DBMS), the SSURGO metadata records only logical data types.  How a logical data type can be physically implemented varies from DBMS to DBMS.
A concatenation of the Soil Taxonomy subgroup and family for a soil (long name).
A connotative label associated with a column used to constrain which records in a table are subject to being aggregated.  This label is displayed in the Soil Data Viewer interface to indicate to the user what kind of constraining value is being requested.
A connotative name for a folder that indicates its corresponding contents.
A data element with a yes/no entry, assigned by soil component, used in Florida.  It is used to identify highly erodible land.
A data element with a yes/no entry, assigned by soil component, used in Florida.  The basis for identifying highly erodible land is the erodibility index of a soil survey map unit.  The erodibility index of a soil is determined by dividing the potential erodibility for each soil survey map unit by the soil loss tolerance (T) value established for the soil.  The potential erodibility for a map unit differs according to the erosion type (water or wind erosion).  The T value represents the maximum annual rate of soil erosion that could take place without causing a decline in long-term productivity.  A soil map unit with an erodibility index of 8 or more is a highly erodible soil map unit.

For water erosion, a soil survey map unit is potentially highly erodible if: (1) the RKLS/T value using the minimum LS factor is less than 8 and (2) the RKLS/T value using the maximum LS factor is equal to or greater than 8. (Predicting Rainfall Erosion Losses; A Guide to Conservation Planning, Field Office Technical Guide, Nat. FSA Handbook Sec. 511.23, and Florida Erosion Control Handbook)
A description of the multiaxial shape of the pore.
A description of the overall shape of the fragment.
A description of the overall shape of the surface fragment.
A descriptive label associated with a column.  For a SSURGO table, every column's label must be unique, making a column's label a suitable alias for identifying a column.  For SSURGO, column labels are typically mixed case character strings with embedded blanks.
A descriptive label associated with a database table.  For SSURGO, every table's label must be unique, making a table's label a suitable alias for identifying a table.  For SSURGO, table labels are typically mixed case character strings with embedded blanks.
A generally accepted common name used for a plant in a geographic region, usually a state.
A group of soils having similar runoff potential under similar storm and cover conditions. Examples are A and A/D.  (NSSH)
A group of soils that share similar recommendations for drainage whether the drainage is subsurface or surface. (Agronomy Guide, ID-160 - Purdue University)
A grouping for selecting plant species best suited for different kinds of soils and for predicting height growth and effectiveness. (National Forestry Manual)
A integer value that uniquely identifies a soil attribute available in the Soil Data Viewer application.
A mappable part of the earth's surface (three dimensional) that represents an episode of landscape development of hills.
A mappable part of the earth's surface (three dimensional) that represents an episode of landscape development of mountains.
A mappable part of the earth's surface (three dimensional) that represents an episode of landscape development of terraces.
A measure of soil exchangeable hydrogen ions that may become active by cation exchange.
A measure of the amount of Sodium (Na) relative to Calcium (Ca) and Magnesium (Mg) in the water extract from saturated soil paste.
A measurement from the top to bottom of a soil horizon throughout its areal extent.
A name associated with a column that is more connotative than the column's corresponding physical name.  For a SSURGO table, every column's logical name must be unique, making a column's logical name a suitable alias for identifying a column.  For SSURGO, column logical names are lower case character strings with no embedded blanks, where individual parts of the logical name may be separated using the underscore character.
A name associated with a database table that is more connotative than the table's corresponding physical name.  For SSURGO, every table's logical name must be unique, making a table's logical name a suitable alias for identifying a table.  For SSURGO, table logical names are lower case character strings with no embedded blanks, where individual parts of the logical name may be separated using the underscore character.
A name given to a relationship between two tables.  If there is more than one relationship between the same two tables, the name of each of those relationships must be unique.
A name that uniquely identifies a particular NASIS rule (interpretation).
A narrative description of a point or line spot feature.
A narrative description of an aggregation method.
A narrative description of the contents of the corresponding folder.
A narrative description of the corresponding soil attribute.
A narrative description of the geomorphic setting of a component.  The description may incorporate multiple geomorphic features as well as their relationship to each other.  The individual parts of the description are recorded in the Component Geomorphic Description table.
A narrative text definition of a rule.
A narrative text description of the logic used to generate an interpretation.
A narrative text description of what a database table represents or records.
A non-connotative string of characters used to uniquely identify a record in the Component Canopy Cover table.
A non-connotative string of characters used to uniquely identify a record in the Component Crop Yield table.
A non-connotative string of characters used to uniquely identify a record in the Component Diagnostic Features table.
A non-connotative string of characters used to uniquely identify a record in the Component Ecological Classification table.
A non-connotative string of characters used to uniquely identify a record in the Component Erosion Accelerated table.
A non-connotative string of characters used to uniquely identify a record in the Component Existing Plants table.
A non-connotative string of characters used to uniquely identify a record in the Component Forest Productivity - Other table.
A non-connotative string of characters used to uniquely identify a record in the Component Forest Productivity table.
A non-connotative string of characters used to uniquely identify a record in the Component Geomorphic Description table.
A non-connotative string of characters used to uniquely identify a record in the Component Hydric Criteria table.
A non-connotative string of characters used to uniquely identify a record in the Component Interpretation table.
A non-connotative string of characters used to uniquely identify a record in the Component Microrelief Surface Morphometry table.
A non-connotative string of characters used to uniquely identify a record in the Component Month table.
A non-connotative string of characters used to uniquely identify a record in the Component Parent Material Group table.
A non-connotative string of characters used to uniquely identify a record in the Component Parent Material table.
A non-connotative string of characters used to uniquely identify a record in the Component Potential Windbreak table.
A non-connotative string of characters used to uniquely identify a record in the Component Restrictions table.
A non-connotative string of characters used to uniquely identify a record in the Component Slope Shape Surface Morphometry table.
A non-connotative string of characters used to uniquely identify a record in the Component Soil Moisture table.
A non-connotative string of characters used to uniquely identify a record in the Component Soil Temperature table.
A non-connotative string of characters used to uniquely identify a record in the Component Surface Fragments table.
A non-connotative string of characters used to uniquely identify a record in the Component table.
A non-connotative string of characters used to uniquely identify a record in the Component Taxonomic Family Mineralogy table.
A non-connotative string of characters used to uniquely identify a record in the Component Taxonomic Family Other Criteria table.
A non-connotative string of characters used to uniquely identify a record in the Component Taxonomic Moisture Class table.
A non-connotative string of characters used to uniquely identify a record in the Component Text table.
A non-connotative string of characters used to uniquely identify a record in the Component Three Dimensional Surface Morphometry table.
A non-connotative string of characters used to uniquely identify a record in the Component Trees To Manage table.
A non-connotative string of characters used to uniquely identify a record in the Component Two Dimensional Surface Morphometry table.
A non-connotative string of characters used to uniquely identify a record in the Distribution Interp Metadata table.
A non-connotative string of characters used to uniquely identify a record in the Distribution Legend Metadata table.
A non-connotative string of characters used to uniquely identify a record in the Distribution Metadata table.
A non-connotative string of characters used to uniquely identify a record in the Feature Description table.
A non-connotative string of characters used to uniquely identify a record in the Horizon AASHTO table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Consistence table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Designation Suffix table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Fragments table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Pores table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Structure Group table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Structure table.
A non-connotative string of characters used to uniquely identify a record in the Horizon table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Text table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Texture Group table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Texture Modifier table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Texture table.
A non-connotative string of characters used to uniquely identify a record in the Horizon Unified table.
A non-connotative string of characters used to uniquely identify a record in the Legend Area Overlap table.
A non-connotative string of characters used to uniquely identify a record in the Legend table.
A non-connotative string of characters used to uniquely identify a record in the Legend Text table.
A non-connotative string of characters used to uniquely identify a record in the Mapunit Area Overlap table.
A non-connotative string of characters used to uniquely identify a record in the Mapunit Crop Yield table.
A non-connotative string of characters used to uniquely identify a record in the Mapunit table.
A non-connotative string of characters used to uniquely identify a record in the Mapunit Text table.
A non-connotative string of characters used to uniquely identify a record in the Survey Area Catalog table.
A non-connotative string of characters used to uniquely identify a record in the Survey Area Interpretation table.
A number which reflects annual precipitation, rainfall distribution, and hydrologic group.  The system allows comparison of the amount of nitrate which could be leached in percolating water.  The numbers were obtained from the Midwest National Technical Center and are used in Indiana.
A rating based on a system that classifies soils according to those properties that affect roadway construction and maintenance.  Soils are classified into seven basic groups plus eight subgroups, for a total of fifteen for mineral soils.  Another class for organic soils is used.  The groups are based on determinations of particle-size distribution, liquid limit, and plasticity index.  The group classification, including group index, is useful in determining the relative quality of the soil material for use in earthwork structures, particularly embankments, subgrades, subbases, and bases.  (American Association fo State Highway and Transportation Officials)
A rating class term for the maximum extreme of the interpretation rating.
A sequential integer number used to denote the overall serial version of the data (tabular and/or spatial) for a soil survey area.
A sequential integer number used to denote the serial version of the spatial data for a soil survey area.
A sequential integer number used to denote the serial version of the tabular data for a soil survey area.
A short descriptive name of a point or line spot feature.
A short text field used to describe a particular soil survey area legend.
A string that indicates if the corresponding Soil Data Viewer rule pertains to an intrinsic soil property or a soil interpretation.
A symbol that uniquely identifies a single occurrence of a particular type of area (e.g. Lancaster Co., Nebraska is NE109).
A symbol that, within the context of a particular soil survey area, uniquely identifies a point or line spot feature.
A system for classifying mineral and organo-mineral soils for engineering purposes based on particle size characteristics, liquid limit, and plasticity index.
A system for ranking soils for major uses, developed by Michigan State University.  Soils are assigned to a group according to the dominant profile texture, the natural drainage class, and the management groups are listed in the same order as the series named in the complex. (Mokma, D.L., E.P. Whiteside, and J.F. Schneider. 1978. Soil Management Units in Land Use Planning. Mich. State Univ., Ext. Bull. E-1262, 12 pp.
A system for ranking soils in Virginia for productivity estimates.  Developed by VPI&SU.  See Virginia Agronomic Land Use Evaluation System (VALUES) 1993.
A term describing the general physical, chemical and mineralogical composition of the material, mineral or organic, from which the soil develops.  Mode of deposition and/or weathering may be implied or implicit.
A term used to denote the presence of a condition or component other than sand, silt, or clay.
A text entry can be identified by its kind, category, and subcategory.  Kind is the highest division of classification.  Text kind provides a grouping of text entries according to their subject matter.
A text entry is identified by its kind, category, and subcategory.  Category is a subdivision of kind.  "Agr" and "Soi" are two categories for the text kind "Nontechnical Description".
A text entry is identified by its kind, category, and subcategory.  Kind is the highest division of classification.  Text kind provides a grouping of text entries according to their subject matter.
A text entry is identified by its kind, category, and subcategory.  Subcategory is a subdivision of category.  For text kind "Nontechnical" description and text category "Agr", subcategory would correspond to the SSSD field "desnum".
A unique symbol used to identify a plant genus or a plant species.  (The PLANTS Database, USDA-NRCS, National Plant Data Center.)
A user assigned name (typically connotative) for a particular interpretation rule.
A user specified term(s) used in association with geomorphic features to further define, clarify, and describe the setting of a soil in the the landscape.  The terms may, for example, describe relative position, mode of formation, degree of degradation, slope, or geologic time of origin.
A user specified term(s) used to further describe the nature of the parent material for a given soil.
A value in tons/acre/year that is a factor in calculating soil loss by wind.  The values are acquired from WEG.
A word or group of words used to name a feature on the earth's surface, expressed in the plural form.
A yes/no field that indicates if a listed AASHTO classification is representative for the horizon.
A yes/no field that indicates if a listed erosion type is representative for the component.
A yes/no field that indicates if a listed parent material is representative for the component.
A yes/no field that indicates if a particular geomorphic feature is representative for the component.
A yes/no field that indicates if a set of descriptors of soil consistence is representative for the horizon.
A yes/no field that indicates if a soil structure is representative for the horizon.
A yes/no field that indicates if a soil texture is representative for the horizon.
A yes/no field that indicates if a Unified soil classification is representative for the horizon.
A yes/no field that indicates if the pores described are representative for the horizon.
A yes/no field that indicates whether or not a map unit component is classified as a "hydric soil".  If rated as hydric, the specific criteria met are listed in the Component Hydric Criteria table.
An Arabic numeral used to indicate a significant change in particle-size distribution or mineralogy that indicates a difference in the material from which the horizon(s) formed and/or a significant difference in age, unless that difference in age is indicated by the suffix "b".  (SSM)
This numeral is one of four kinds of symbols, that when concatenated, are used to distinguish different kinds of layers in the soil.
An erodibility factor which quantifies the susceptibility of soil particles to detachment and movement by water. This factor is adjusted for the effect of rock fragments.
An erodibility factor which quantifies the susceptibility of soil particles to detachment by water.
An estimate of the amount of moisture available for plant use and/or soil forming processes at a given site.  It may vary, plus or minus, from "actual" precipitation amounts as a function of runon, runoff, temperature, aspect, etc.
An estimation of the difficulty of working an excavation into soil layers, horizons, pedons, or geologic layers.  In most instances, excavation difficulty is related to and controlled by a water state.
An expression of the sharpness of edges and corners of fragments.  (Sedimentary Rocks, Pettijohn, 1957)
An expression of the sharpness of edges and corners of surface fragments.
An expression, based on the USDA system of particle sizes, for the relative portions of the various size groups of individual mineral grains less than 2mm equivalent diameter in a mass of soil.
An index of the capacity of a soil to produce a specific plant under a defined management system.
An indication of the proportion of the map unit, expressed as a class, that is "hydric", based on the hydric classification of individual map unit components.
An indicator of the design scheme of the rule.

1 = limitation
2 = suitability
3 = class

When rule design is either "limitation" or "suitability", this entry provides an indication of which end of the fuzzy value range, 0 or 1, represents the most limiting features.  When rule design is "class", the rating values are not considered to be logically ordered.

Most non-class interpretive rules are designed such that the most limiting features are those with a fuzzy value closest to 1.  However, non-class interpretive rules that are designed to evaluate the favorable features of a soil, such as the suitability as a gravel source, may be written such that the most limiting features are those with a fuzzy value closest to 0.
An indicator of the design scheme of the rule.  The entry provides an indication of which end of the fuzzy value range, 0 or 1, represents the most limiting features.  

Most interpretive rules are designed such that the most limiting features are those with a fuzzy value closest to 1.  However, interpretive rules that are designed to evaluate the favorable features of a soil, such as the suitability as a gravel source, may be written such that the most limiting features are those with a fuzzy value closest to 0.
An integer number assigned by a user to identify a particular row in the table.
An integer number assigned by the user to identify a particular row in the table.
An integer number that unique identifies a map legend.  A map legend identifies some of the attributes needed to create the legend for a corresponding thematic map.
An integer number that uniquely identifies a NASIS site.
An integer number used to order the list of valid aggregation methods.
An integer referring to the Feature ID in another row in the same table, intended to indicate a relationship between two or more rows in a table.
An integer referring to the Structure ID in another row in the same table, intended to indicate if the soil structure described on the current row parts or separates to the structure described on the other row.
An integer value that identifies the parent folder of the corresponding folder, if any.  At this time we chose to not actually create folder hierarchies, but we decided to retain this column in case we ever do.
An integer value that uniquely identifies its corresponding folder.
An integer value used to order folders within the same context.
An interger number used to sequence the months of the year in their proper order.
An interpretation rating of the susceptibility of the soil to frost heaving.
An interpretation rule may contain subordinate rules, which in turn may have subordinate rules.  This is an indicator of the depth within the interpretation hierarchy that a particular rule exists, where zero is the top level.
An NRCS business unit responsible for oversight of soil survey production activities of a particular soil survey area.
Available water storage (AWS).  The volume of water that the soil, to a depth of 100 centimeters, can store that is available to plants.  It is reported as the weighted average of all components in the map unit, and is expressed as centimeters of water.

AWS is calculated from AWC (available water capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension, and adjusted for salinity and fragments.
Available water storage (AWS).  The volume of water that the soil, to a depth of 150 centimeters, can store that is available to plants.  It is reported as the weighted average of all components in the map unit, and is expressed as centimeters of water.

AWS is calculated from AWC (available water capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension, and adjusted for salinity and fragments.
Available water storage (AWS).  The volume of water that the soil, to a depth of 25 centimeters, can store that is available to plants.  It is reported as the weighted average of all components in the map unit, and is expressed as centimeters of water.

AWS is calculated from AWC (available water capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension, and adjusted for salinity and fragments.
Available water storage (AWS).  The volume of water that the soil, to a depth of 50 centimeters, can store that is available to plants.  It is reported as the weighted average of all components in the map unit, and is expressed as centimeters of water.

AWS is calculated from AWC (available water capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension, and adjusted for salinity and fragments.
Average distance between surface stones and/or boulders, measured between edges.
Average duration of inundation per flood occurrence and expressed as a class.  (NSSH)
Average vertical distance through which the minimum diameter of the pore exceeds 0.5mm when the soil layer is moist or wetter.
Beginning month qualifier (full month name) for soil properties at the component month level or below.
Carbonate particles less than 0.002mm in equivalent diameter as a weight percentage of the less than 2.0mm fraction.
Cation exchange activity classes are used as family criteria differentiae.  It is the relative cation exchange (CEC) activity level of the soil based on the CEC to clay ratio. (Soil Taxonomy)
Class of accelerated erosion. (SSM)
Code identifying the kind of mapunit.  Example: C - consociation.
Corn Suitability Rating (CSR) is an index procedure developed in Iowa to rate each different kind of soil for its row-crop productivity.
Correlated name of the mapunit (recommended name or field name for surveys in progress).
Criterion code for the soil characteristic(s) and/or feature(s) that cause the map unit component to be classified as a "hydric soil."  These codes are the paragraph numbers in the hydric soil criteria publication.
Crop specific groupings of soils indicating potential yields under a high level of management.
Crop yield units per unit area for the specified crop.
Daily average potential evapotranspiration for the referenced month.
Description of the geomorphic component for flats.
Ending month qualifier (full month name) for soil properties at the component month level or below.
Explicit constraints used to restrict which records in a table are subject to being aggregated.  One of several possible mechanisms for specifying constraints as to which records are subject to being aggregated.  Multiple constraint mechanisms may be concurrently specified.
For a soil interpretation, the phrase to be used when a rating cannot be determined.  The default value for this string is "Not rated", but NASIS permits the designer of an interpretation to change this default.
For intrinsic soil properties, whether ties should select the lowest or highest value may be an arbitrary decision.  In such a case, this flag can be set, and in advanced mode the user can then specify at run time whether the lowest or highest value should be selected in case of a tie.
General description of the texture of the parent material.   Class limits correspond to those of textural groupings defined in the Soil Survey Manual and family particle-size classes in Soil Taxonomy.
Grouping of soils that have similar properties affecting their resistance to soil blowing in cultivated areas.  The groups indicate the susceptibility to soil blowing.
Hydrologic Group is a grouping of soils that have similar runoff potential under similar storm and cover conditions. This column displays the dominant hydrologic group for the map unit, based on composition percentage of each map unit component.
Identification of map units as prime farmland, farmland of statewide importance, or farmland of local importance.
Identifies the current status of the map unit.

As of SSURGO version 2.1, values for this attribute are no longer provided.  This attribute will be dropped from the next major SSURGO version.
Identifies the kind of component of the mapunit. Examples are series and miscellaneous areas.
Identifies the natural drainage conditions of the soil and refers to the frequency and duration of wet periods.  An example of a drainage class is well drained.
Identifies the operational activity of a soil survey area and currency of published soil information.  Examples are Non-Project, Update and Published.

As of SSURGO version 2.1, values for this attribute are no longer provided.  This attribute will be dropped from the next major SSURGO version.
Identifies the relative geographic extent over which a legend has the most up-to-date soil survey data.

As of SSURGO version 2.1, values for this attribute are no longer provided.  This attribute will be dropped from the next major SSURGO version.
In some cases the column that is being aggregated to the map unit level corresponds to an attribute whose values are restricted to a ranked domain.  In this case, this rank value is used to resolve ties.  In order to be able to retrieve this rank value, the corresonding domain name must be provided.
Indicates if a choice in a choice list or domain is considered "obsolete".  If obsolete, data being currently populated would likely use a different choice.
Indicates if in order for a record to exist in the right table of a relationship, a corresponding record must exist in the left table of that relationship, i.e. mandatory = "yes".  In other words, when mandatory is "no", a record may exist in the right table of a relationship without having a corresponding record in the left table of that relationship.
Indicates if null values for the corresponding soil attribute should be conditionally converted to zero at run time.
Indicates if the corresponding attribute is considered to be "at the component level", in the map unit table hierarchy.
Indicates if the corresponding attribute is considered to be "at the component month level", in the map unit table hierarchy.
Indicates if the corresponding attribute is considered to be "at the horizon level", in the map unit table hierarchy.
Indicates if the corresponding attribute is considered to be "at the map unit level", in the map unit table hierarchy.
Indicates if the corresponding interpretation is designed as a limitation, suitability or class.
Indicates if the corresponding soil attribute is available in the basic mode of the Soil Data Viewer application.
Indicates if the corresponding soil attribute or Soil Data Viewer rule is ready to distribute publicly.
Indicates if the depth qualifier for the corresponding soil attribute can be changed at run time.
Indicates if the month range qualifiers for the corresponding soil attribute can be changed at run time.
Indicates if the option to interpret nulls as zero for the corresponding soil attribute should be able to be changed at run time.
Indicates if ties should be broken by selecting the lowest value (-1) or the highest value (1).
Indicates the means by which layer depths are qualified: "Surface Layer", "All Layers" or "Depth Range".  Pertains to properties of a soil horizon or layer.
Indicates the presence or absence of carbonates and the reaction.  They are treated together because of their intimate relationship, and are used to indicate family differentiae.  (Soil Taxonomy)
Indicates whether or not a component is a major component in the mapunit.
Indicates whether or not all values of an index must be unique, or whether duplicate values may exist.
Indicates whether or not an object is approved for use.
Indicates whether or not the value of a column in a database table may be null.
Indicates whether the relationship between the left table and right table is one to one (left is one, right is one) or one to many (left is one, right is many).  For a one to one relationship, a record in the left table is related to no more than one record in the right table.  For a one to many relationship, a record in the left table may be related to more than one record in the right table.  Neither cardinality implies that a record in the left table necessarily has a corresponding record in the right table.
Information that is ultimately used to convey how the map legend for the corresponding soil attribute should be rendered.
Initials that identify an aggregation method.
Interpretative class for the map unit, based on NH developed interpretations.
Kind of diagnostic horizon or diagnostic feature in the soil.
Layer depth to bottom, when layer depths are qualified by "Depth Range".
Layer depth to top, when layer depths are qualified by "Depth Range".
Mass per unit of volume (not including pore space) of the solid soil particle either mineral or organic.  Also known as specific gravity.
Measurement of the smallest dimension of the selected secondary particles, units, or peds.
Mineral particles 0.002 to 0.05mm in equivalent diameter as a weight percentage of the less than 2.0mm fraction.
Mineral particles 0.05 to 0.10mm in equivalent diameter as a weight percentage of the less than 2 mm fraction.
Mineral particles 0.05mm to 2.0mm in equivalent diameter as a weight percentage of the less than 2 mm fraction.
Mineral particles 0.10 to 0.25mm in equivalent diameter as a weight percentage of the less than 2 mm fraction.
Mineral particles 0.25mm to 0.5mm in equivalent diameter as a weight percentage of the less than 2 mm fraction.
Mineral particles 0.5mm to 1.0mm in equivalent diameter as a weight percentage of the less than 2 mm fraction.
Mineral particles 1.0mm to 2.0mm in equivalent diameter as a weight percentage of the less than 2 mm fraction.
Mineral particles less than 0.002mm in equivalent diameter as a weight percentage of the less than 2.0mm fraction.
Mineral particles ranging in size from 0.002 to 0.02mm in equivalent diameter as a weight percentage of the less than 2.0mm fraction.
Mineral particles ranging in size from 0.02mm to 0.05mm in equivalent diameter as a weight percentage of the less than 2.0mm fraction.
Mineralogy classes are used as family differentiae.  They are based on the approximate mineralogical composition of selected size fractions of the same segment of the soil (control section) that is used for application of particle-size classes.  (Soil Taxonomy)
Name assigned to a component based on its range of properties.
Name for the concatenation of PARENT_MATERIAL_MODIFIER, PARENT_MATERIAL_KIND, and PARENT_MATERIAL_ORIGIN for each of the parent materials that may occur in a vertical cross section of a soil.
Name for the concatenation of TEXTURE_MODIFIER and TEXTURE_CLASS.
Narrative text notes (metadata) associated with the assignment of the tabular data certification status for a particular soil survey area.
Natural condition of the soil component.
New Hampshire Soil Potential Index for Agriculture, 1992 revision.  Used for computation of weighted average SPI on a parcel of land for adjustment of current use land assessment.
Numbers correspond to the NRCS printed publication "26 Ecological Communities of Florida" 1995.  This publication is based on the awareness that a soil type commonly supports a specific vegetative community, which in turn provides the habitat needed by specific wildlife species.
One end of the range in characteristics for the slope aspect of a component.  This end of the range is expressed in degrees measured clockwise from true north, and is the end of the range that is clockwise from the representative slope aspect.
One end of the range in characteristics for the slope aspect of a component.  This end of the range is expressed in degrees measured clockwise from true north, and is the end of the range that is counter-clockwise from the representative slope aspect.
One of four kinds of symbols, that when concatenated, are used to distinguish different kinds of layers in soils.  Master horizons and layers are the base symbols to which other characters are added to complete the designations.  Capital letters, virgules (/), and ampersands (&) are used. (SSM)
One of several pseudo-hierarchical terms used to describe relative levels of scale for geomorphic terms.
One of the four kinds of symbols, that when concatenated, are used to distinguish different kinds of layers in soils. Letter suffixes are used to designate subordinate distinctions within master horizons, and layers using lowercase letters.  (SSM)
One of the four kinds of symbols, when concatenated, are used to distinguish different kinds of layers in soils. Vertical subdivisions are used to subdivide a horizon or layer designated by a single letter or combination of letters.
One of the twelve months of the year.
Particle-size classes are used as family differentiae. Particle-size refers to grain-size distribution of the whole soil and is not the same as texture.  (Soil Taxonomy).
Percent of coverage (canopy) attributed to a specific plant species.
Percent of the ground covered by fragments 2 mm or larger (20 mm or larger for wood fragments).
Phase criterion other than slope, texture, and flooding used to identify soil components.
Phase criterion to be used at a local level, in conjunction with "component name" to help identify a soil component.
Runoff potential class for the soil.
Sequential number of the feature being described.
Size based on the multiaxial dimensions of the fragment fraction.
Size based on the multiaxial dimensions of the surface fragment.
Soil characteristics other than the defined family characteristics of particle-size classes, mineralogy classes, calcareous and reaction  classes, and soil temperature classes.  These characteristics include depth of soil, consistence, moisture equivalent, slope of soil, and permanent cracks.  (Soil Taxonomy)
Soil fraction passing a number 10 sieve (2.00mm square opening) as a weight percentage of the less than 3 inch (76.4mm) fraction.
Soil fraction passing a number 200 sieve (0.074mm square opening) as a weight percentage of the less than 3 inch (76.4mm) fraction.
Soil fraction passing a number 4 sieve (4.70mm square opening) as a weight percentage of the less than 3 inch (76.4mm) fraction.
Soil fraction passing a number 40 sieve (0.42mm square opening) as a weight percentage of the less than 3 inch (76.4mm) fraction.
Soil loss tolerance factor.  The maximum amount of erosion at which the quality of a soil as a medium for plant growth can be maintained.
Soil moisture classes are unique to the family classification, though not included specifically in the name, this is a mechanism to provide clear identification of the actual moisture regime.
Soil moisture subclasses are taxonomic subgroup criteria, whether included or not in the name of the subgroup.  The definition of each subclass is dependent upon the specific taxonomic great group to which it is attached.
Soil related use restrictions for Triumph 4E Insecticide are applicable in certain conditions in Florida.  Please note the label for the conditions.  The soil related conditions are as follows:
1. A permeability of six inches/hour or more (rapid or very rapid permeability) and
2. A water holding capacity of 0.10 inch/inch of soil or less (low or very low water holding capacity)--
in all horizons to a depth of 80 inches or to bedrock if bedrock is within 80 inches of the surface.

The choice indicates that if a component has soil properties, according to state labeling, favorable for the application of the pesticide Triumph 4E Insecticide (trademark), the entry is Yes.  If the component does not have favorable properties the entry is No.
Soil temperature regime as defined in Soil Taxonomy.
Specifies the sequence in which the members of a domain should be ordered or displayed.
Specifies the sequence of a column in a database table index.
Specifies the sequence of the columns in a database table.
Substitute terms applied to materials that do not fit into a textural class because of organic matter content, size, rupture resistance, solubility, or another reason.
Suitability of the soil to produce the habitat elements for woodland wildlife.
Suitability of the soil to produce the wildlife element coniferous trees.
Suitability of the soil to produce the wildlife element grain.
Suitability of the soil to produce the wildlife element grass.
Suitability of the soil to produce the wildlife element hardwood trees.
Suitability of the soil to produce the wildlife element herbaceous plants.
Suitability of the soil to produce the wildlife element shrub.
Suitability of the soil to produce the wildlife habitat element wetland plant.
Suitability of the soil to support the habitat elements for wetland wildlife.
Suitability of the soil to support the habitat requirements for openland wildlife.
Suitability of the soil to support the habitat requirements for rangeland wildlife.
Suitability of the soil to support the wildlife habitat element shallow water.
Susceptibility of concrete to corrosion when in contact with the soil.
Susceptibility of uncoated steel to corrosion when in contact with the soil.
Taxonomic family criteria that is used to indicate the presence of more than two strongly contrasting classes in the particle size control section.  (Soil Taxonomy)
Text kind provides a grouping of text entries according to their subject matter.  For example, the text kind "edit notes" groups text entries that deal with adding or changing data.
The abbreviated form of the units of measure in which the corresponding soil attribute is recorded.
The acreage total of all land and water areas in the specified geographic area to which the legend applies.  The number listed here is used for administrative purposes and may differ from that measured using GIS software, or other techniques, due to fact that it was assigned to agree with the acreage listed in the NRCS Natural Resource Inventory for the geographic area.
The actual narrative text portion of a text entry.  The other parts of a text entry are its identifiers: kind, category and subcategory.
The amount by weight of decomposed plant and animal residue expressed as a weight percentage of the less than 2 mm soil material.
The amount of aluminum extracted in 1 normal potassium chloride.  The following laboratory method is applied:  55 ml of 1 normal potassium chloride is extracted through 2.5 g of soil sample.  The extract is analyzed by use of an atomic adsorption spectrometer or similar instrument (SSIR #1, method 6G9a and NSSH).
The amount of ammonium oxalate extractable aluminum in the less than 2mm fraction.  This is an estimate of the total pedogenic aluminum, much of which may be in noncrystalline material, or complexed by organic matter.
The amount of ammonium oxalate extractable iron in the less than 2mm fraction.  It is considered a measure of noncrystalline iron in the soil.
The amount of phosphorous in the less than 2mm fraction, that is extractable by aluminum oxalate method.  It represents the phosphorous level intermediate between total P and water soluble P.
The amount of phosphorous in the less than 2mm fraction, that is extractable using the Bray1 method.  It represents the plant available phosphorous content.
The amount of readily exchangeable cations that can be electrically adsorbed to negative charges in the soil, soil constituent, or other material, at pH 7.0, as estimated by the ammonium acetate method.
The amount of water soluble phosphorous in the less than 2mm fraction, that is extractable by distilled water.  It represents the mobile phosphorous content.
The amount of water that an increment of soil depth, inclusive of fragments, can store that is available to plants.  AWC is expressed as a volume fraction, and is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension and adjusted for salinity, and fragments.
The amount of water that would move vertically through a unit area of saturated soil in unit time under unit hydraulic gradient.
The annual growth of forest overstory tree species.
The annual probability of a flood event expressed as a class.  (SSM).
The annual probability of a flood event expressed as a class.  This column displays the highest probability class assigned to an individual component of the map unit whose composition in the map unit is equal to or exceeds 15%.
The annual probability of a flood event expressed as a class. This column displays the dominant flood frequency class for the map unit, based on composition percentage of map unit components whose composition in the map unit is equal to or exceeds 15%.
The approximate area of a particular map unit delineation represented by a point feature on a soil map.
The approximate width of a particular map unit delineation represented by a linear soil feature on a soil map.
The area overlap of two geographic regions, in acres.
The arithmetic average of the daily maximum and minimum temperatures for a calendar year taken over the standard "normal" period, 1961 to 1990.
The arithmetic average of the total annual (liquid) precipitation taken over the standard "normal" period, 1961-1990.
The average diameter of a pore.  (SSM)
The average duration, or length of time, of the ponding occurrence.  (NSSH)
The base part of the file name of a table's associated ASCII pipe delimited import/export file.  The complete name of a table's associated import/export file is the base name followed by the characters ".txt".  For example, if the base name is "alpha", the name of the associated import/export file is "alpha.txt".
The broadest category in the land capability classification system for irrigated soils.
The broadest category in the land capability classification system for nonirrigated soils.
The broadest category in the land capability classification system for soils.   This column displays the dominant capability class, under irrigated conditions, for the map unit based on composition percentage of all components in the map unit.
The broadest category in the land capability classification system for soils.   This column displays the dominant capability class, under non-irrigated conditions, for the map unit based on composition percentage of all components in the map unit.
The California Storie Index expresses numerically the relative degree of suitability of a soil for general intensive agricultural uses at the time of evaluation.  The rating is based on soil characteristics only and is obtained by evaluating such factors as soil depth, texture of the surface soil, subsoil characteristics, and surface relief.

Storie, R. Earl and Walter W. Weir. 1948. Manual for identifying and classifying California soil series.  With 1958 Supplement, revised 1978. Associated Students Store, University of California, Berkley, California.
The common name for the crop.
The common, typical, or expected direction toward which the surface of the soil faces, expressed as an angle between 0 and 360 degrees measured clockwise from true north.
The component percent composition value below which components should not be included in the aggregation process.
The concatenated string of four kinds of symbols (five data elements) used to distinguish different kinds of layers in the soil.  (SSM)
The connotative name of an interpretation.
The connotative name of the corresponding soil attribute.
The current status of a NASIS export request.  This status may reflect either a pending request status or a processed request status.
The daily average precipitation for the referenced month.  Commonly calculated as the total precipitation for the month divided by the number of days in the month.  (February nominally has 28 days).
The date and time that a particular version of data (tabular and/or spatial) for the soil survey area was established.
The date and time that a particular version of tabular data for the soil survey area was established.
The date and time that a request to export data, which was submitted by a NASIS user, was actually processed.
The date and time that soil survey area tabular data was exported from NASIS.
The date and time that the corresponding interpretive results for this interpretation were generated.
The date and time that the logic of an interpretation was last modified.
The date associated with a particular record, expressed as month, day, year -- xx/xx/xxxx.
The date of the most recently updated component of an interpretation.  This date is not necessarily the when last updated date of the interpretation itself.  An interpretation may have a subrule, evaluation or property that was updated more recently than the master interpretation (rule) itself.  The time of update of an interpretation component (subrule, evaluation, property) in NASIS is not explicitly reflected in other components that may reference the updated component.
The date on which the SSURGO product for a particular soil survey is actually archived, expressed as month, day, year -- xx/xx/xxxx.
The date the final correlation document for a soil survey is signed, expressed as month, year (e.g. 07/1999).
The decimal precision of the corresponding soil attribute.
The decrease of surface elevation that occurs within the first 3 years of drainage of wet soils having organic layers or semifluid mineral layers.  (NSSH)
The degree to which a puddled, wet soil mass is permanently deformed without rupturing by a slow continuous application of force in any direction.  (SSM)
The depth of surface water that is ponding on the soil.
The description of ground cover based on a set of vegetal and non-vegetal classes.  It is determined (at least conceptually) as a vertical projection downward.  Level two of a hierarchical system.
The descriptive name of a particular ecological community.  For NRCS ecological sites, it is the concatenated form of three or six other fields.  The actual fields that are concatenated together to form this name differ between range and forest ecological sites.
The desired number of classes in a thematic map legend.  At the current time this value is only required when map legend type is "Natural Break Classes".
The difference in elevation between two points, expressed as a percentage of the distance between those points. (SSM)
The difference is elevation between two points, expressed as a percentage of the distance between those points.  This column displays the slope gradient of the dominant component of the map unit based on composition percentage.
The difference is elevation between two points, expressed as a percentage of the distance between those points.  This column displays the weighted average slope gradient of all components in the map unit.
The distance from the point of origin of overland flow to the point where either the slope gradient decreases enough that deposition begins, or the runoff water enters a well-defined channel that may be part of a drainage network or a constructed channel. (Predicting Rainfall Erosion Losses a Guide to Conservation Planning, Agr. Handbook #537, USDA, 1978).
The distance from the soil surface to the lower boundary of the restrictive layer.
The distance from the soil surface to the top of a bedrock layer, expressed as a shallowest depth of components whose composition in the map unit is equal to or exceeds 15%.
The distance from the soil surface to the upper boundary of the restrictive layer.
The distance from the top of the soil to the base of the identified diagnostic horizon or to the lower limit of the occurrence of the diagnostic feature.
The distance from the top of the soil to the base of the soil horizon.
The distance from the top of the soil to the lower boundary of the moisture layer.
The distance from the top of the soil to the lower boundary of the soil temperature layer.
The distance from the top of the soil to the upper boundary of the identified diagnostic horizon or to the upper limit of the occurrence of the diagnostic feature.
The distance from the top of the soil to the upper boundary of the moisture layer.
The distance from the top of the soil to the upper boundary of the soil horizon.
The distance from the top of the soil to the upper boundary of the soil temperature layer.
The distance from the top to bottom of a restrictive layer.
The distance from the upper to lower boundary of the identified diagnostic horizon or feature.
The distinctness of the peds described in terms of ease of separation into discrete units.
The edition of Keys to Soil Taxonomy used to classify the soil.
The electrical conductivity of an extract from saturated soil paste.
The empirical group index formula devised for approximately within-group evaluation of the "clayey granular materials" and the "silty-clay materials".
The estimate of the total phosphorous content of the soil, measured after total dissolution of a size fraction of the soil material.  It is reported as a gravimetric percent oxide of the size fraction used.
The estimated annual potential production of range forage per year.
The estimated ratio of the incident short-wave (solar) radiation that is reflected by the air dry, less than 2 mm fraction of the soil surface.
The estimated volumetric soil water content at or near zero bar tension, expressed as a percentage of the whole soil.
The expected number of days between the last freezing temperature (0 degrees Celsius) in spring (Jan-Jul) and the first freezing temperature (0 degrees Celsius) in the fall (Aug-Dec).  The number of days is based on the probability that the values for the standard "normal" period of 1961 to 1990 will be exceeded in 5 years out of 10.
The expected yield per acre of the specific crop with irrigation.
The expected yield per acre of the specific crop without supplemental irrigation.
The extent, in acres, of the map unit within the geographic area referenced in the Legend Area Overlap table.
The FGDC (Federal Geographic Data Committee) spatial and/or tabular metadata for the corresponding soil survey area, in XML format.
The following soil related use restrictions for Temik 10G (aldicarb) exits if the pesticide is to be applied to citrus in Florida.
Temik cannot be used within 1000 feet of a drinking water well unless it is known that the well is cased to 100 feet below ground level or to a minimum of 30 feet below the water table in soils that have:
1. A permeability of twenty inches/hour or more (very rapid permeability) and
2. A water holding capacity of less than 0.06 inch/inch of soil (very low water holding capacity)--
in all horizons to a depth of 80 inches or to bedrock if bedrock is within 80 inches of the surface.
The choice indicates that if a component has soil properties, according to state labeling, favorable for the application of the pesticide Temik 10G, the entry is Yes.  If the component does not have favorable properties the entry is No.
The fourth level of Soil Taxonomy.  The subgroup is below great group and above family.
The full genus and species name as listed in the PLANTS Database, USDA-NRCS, National Plant Data Center.
The full name of one of the twelve months of the year.
The full texture description for a horizon, using full texture class and in lieu of names rather than abbreviations.
The geometric, two dimensional profile (shape) of the slope parallel to elevation contours.
The hardness of a fragment.
The hardness of the fragment.
The height in feet of the dominant or dominant and co-dominant trees at some index age, except for the pinyon-juniper forest type, for which site index is determined by basal area.
The highest level in Soil Taxonomy.
The Highly Erodible Lands (HEL) classification for the mapunit based on the rating of its components for water HEL classification.
The Highly Erodible Lands (HEL) classification for the mapunit based on the rating of its components for wind HEL classification.
The identifier for a particular Conservation Tree Shrub Group (CTSG) which that is associated with a soil map unit component.  A CTSG is a physiographic unit or area having similar climatic and edaphic characteristics that control the selection and height of growth of trees and shrubs (National Forestry Manual).
The identifier of a particular ecological community.  For NRCS ecological sites, it is the concatenated form of ecological site type, ecological site MLRA, ecological site LRU, ecological site number and ecological site state FIPS alpha code.
The identifier of the Forage Suitability Group to which the map unit component is assigned.
The identifying symbol given to the specified geographic area to which the legend applies.
The identifying symbol given to the specified geographic area with which the soil survey area overlaps or coincides.
The interpretive separations, or class, based on the ability of the map unit to support an onsite septic system. (Ancillary Soil Interpretation Ratings For On-site Sewerage Disposal in Vermont)
The kind of slight variations in the height of a land surface that are too small or intricate to delineate on a topographic or soils map at commonly used scales (1:24000, and 1:10000).
The last date in which any data element of a particular NASIS object (area, data mapunit, etc.) was modified.
The lead agency designated as responsible for a particular soil survey.
The level of certification assigned to a legend.  Intended to indicate whether or not the legend should be used and the degree of confidence with which it may be used.

As of SSURGO version 2.1, values for this attribute are no longer provided.  This attribute will be dropped from the next major SSURGO version.
The level of certification assigned to a map unit.  Intended to indicate whether or not the map unit should be used and the degree of confidence with which it may be used.

As of SSURGO version 2.1, values for this attribute are no longer provided.  This attribute will be dropped from the next major SSURGO version.
The level of certification assigned to a tabular data package for a particular soil survey area.
The level of detail and relative intensity of field observation under which the map unit was developed.  Order 1 indicates the highest intensity, and order 5 the lowest.
The linear expression of the volume difference of natural soil fabric at 1/3 or 1/10 bar water content and oven dryness. The volume change is reported as percent change for the whole soil.
The lithology/composition of the 2 mm or larger fraction of the soil (20 mm or larger for wood fragments).
The lithology/composition of the surface fragments 2 mm or larger (20 mm or larger for wood fragments).
The logical data type of the corresponding primary constraint column.
The logical data type of the corresponding secondary constraint column.
The logical data type of the corresponding soil attribute.
The logical data type of the output rating value.  For most aggregation methods, this is the same as the logical data type of the column that is the subject of the SDV Rule in question.  For aggregation method "Percent Present", the effective logical data type will always be "Integer".  For aggregation method "Weighted Average", for a class soil interpretation, the effective logical data will always be "Float".
The long-term monthly average of the mean daily soil temperature of the layer for the month in question.  Long-term is generally considered to be a 30-year average.
The longitudinal shape of the slope.
The manner in which soil specimens fail under increasing force. (SSM)
The map scale in which the final map products will be published, expressed as the denominator of the scale, i.e. 24000 = 1:24000.
The maximum allowable length of a column whose logical data type is "string".
The maximum allowable number of characters in a string attribute.
The maximum allowable value of a column.
The maximum capacity of thoroughly puddled soil to adhere to other objects.
The maximum extreme numeric rating for the interpretation rating.
The maximum number of reasons recorded for the corresponding soil interpretation.
The maximum numeric rating of the representative values of the interpretation rating.
The method by which horizon level attribute values are aggregated in order to derive a value to represent the corresponding component.  There are only two options, weighted average and weight sum.  For the vast majority of horizon level attributes, weighted average is used.  Weighted sum may be appropriate for a horizon level attribute whose corresponding unit of measure is something/(linear unit of measure).  At the time this was written, the only horizon level attribute for which weighted sum is used is available water capacity, whose unit of measure is cm/cm.
The minimum allowable value of a column.
The minimum extreme numeric rating for the interpretation rating.
The minimum numeric rating of the representative values for the interpretation rating.
The multiaxial shape of secondary particles, units, or peds.
The name given to the specified geographic area to which the legend applies.
The name given to the specified geographic area.
The name of a column used to constrain which records in a table are subject to being aggregated.  One of several possible mechanisms for specifying constraints as to which records are subject to being aggregated.  Multiple constraint mechanisms may be concurrently specified.
The name of a column used to constrain which records in a table are subject to being aggregated.  One of several possible mechanisms for specifying constraints as to which records are subject to being aggregated.  Multiple contraint mechanisms may be concurrently specified.

The choice list for the secondary constraint column is constrained to data found in records that match the value specified for the primary constraint column.
The name of a geographic area with which the soil survey area overlaps or coincides.  Examples include the name of a particular state or county.
The name of a method by which a soil property or interpretation may be aggregated.  In some table contexts, the default aggregation method for the corresponding soil attribute.
The name of a particular ecological classification scheme.  An example might be "West Virginia Grassland Suitability Groups" or "NRCS Ecological Sites".
The name of a particular type of area.  Area type names include "state", "county", "mlra", etc.
The name of a particular type of geographic area to which the legend applies.  Examples include "Non-MLRA Soil Survey Area" and "MLRA Soil Survey Area".
The name of a particular type of geographic area with which the soil survey area overlaps or coincides.  Examples include "state or territory" and "county or parish".
The name of an interpretation, such as ENG - Dwellings with Basements.  A main rule (interpretation) may contain subordinate rules, which in turn may have other subordinate rules.  The main rule entry in this column is the user assigned name (typically connotative) for the interpretation rule at the top of the hierarchy.
The name of the column in which the results of the aggreation process are ultimately stored.
The name of the domain to which a column's values are restricted.  A domain is a finite list of character strings that a column's value may assume.
The name of the SSURGO table column that contains the corresponding soil attribute.
The name of the SSURGO table that contains the corresponding soil attribute.
The name that is used to physically implement a table column in a database management system.  In a database table, each column's physical name must be unique.
The name that is used to physically implement a table in a database management system.  In a database, each table's physical name must be unique.
The name that is used to physically implement an index in a database management system.
The narrative description of the soil structure within a soil horizon.
The narrative text description or definition of a column.
The narrative text description or definition of a member of a domain.
The natural drainage condition of the soil refers to the frequency and duration of wet periods.  This column displays the dominant drainage class for the map unit, based on composition percentage of each map unit component.
The natural drainage condition of the soil refers to the frequency and duration of wet periods.  This column displays the wettest drainage class assigned to an individual component of the map unit whose composition in the map unit is equal to or exceeds 15%.
The natural or artificial material that is observed to cover a portion of the earth's surface.  It is determined (at least conceptually) as a vertical projection downward.  Level one of a hierarchical system. (1992 NRI Instructions)
The negative logarithm to base of 10 or the hydrogen ion activity in the soil, using the 0.01M CaCl2 method, in a 1:2 soil:solution ratio.  A numerical expression of the relative acidity or alkalinity of a soil sample. (SSM)
The negative logarithm to the base 10, of the hydrogen ion activity in the soil using the 1:1 soil-water ratio method.  A numerical expression of the relative acidity or alkalinity of a soil sample.  (SSM)
The number in the National Register of Site Index Curves corresponding to the site index curve used to determine the site index and the annual productivity of forest overstory tree species.
The number of a selected size of pores per unit area of undisturbed soils.
The number of acres of a particular map unit within the geographic area to which the legend applies.  The number listed here may differ from that measured using GIS software due to different measuring techniques and rounding practices, or due to the fact that the value has been adjusted so that the sum total of all map units in the legend equals that listed for soil survey area.
The number of characters in the longest member of a domain.  Each member of a domain is an ASCII character string consisting of at least 1 but no more than 254 characters.
The number of decimal digits that should be displayed for a column whose logical data type is "float".
The number of times ponding occurs over a period of time. (SSM)
The numerical difference between the liquid limit and plastic limit.
The oven dried weight of the less than 2 mm soil material per unit volume of soil at a water tension of 1/10 bar.
The oven dry weight of the less than 2 mm soil material per unit volume of soil at a water tension of 1/3 bar.
The oven dry weight of the less than 2 mm soil material per unit volume of soil at a water tension of 15 bar.
The oven dry weight of the less than 2 mm soil material per unit volume of soil exclusive of the desication cracks, measured on a coated clod.
The overall Highly Erodible Lands (HEL) classification for the mapunit based on the rating of its components for wind and water HEL classification.
The percent by weight of hydrated calcium sulfate in the less than 20 mm fraction of soil.
The percent by weight of the horizon occupied by rock fragments 3 to 10 inches in size.
The percent by weight of the horizon occupied by rock fragments greater than 10 inches in size.
The percent composition of the map unit that has the capability class displayed in the Irrigated Capability Class
The percent composition of the map unit that has the capability class displayed in the Non-Irrigated Capability Class  - Dominant Condition column.
The percentage of the component of the mapunit.
The percentage of the map unit that is subject to water being ponded on the soil surface, expressed as one of four classes; 0-14%, 15-49%, 50-74% or 75-100%.
The percentage of total annual site production attributed to the specific forest understory plant, expressed as percent of total air dry plant material by weight.
The percentage of total annual site production attributed to the specific rangeland plant, expressed as percent of total air dry plant material by weight.
The physical name of a column of a table on the left side of a relationship between two tables.  This column is one of several potential columns used to create a join between the two tables involved in a relationship.  The left table column joins to its corresponding right table column.
The physical name of a column of a table on the right side of a relationship between two tables.  This column is one of several potential columns used to create a join between the two tables involved in a relationship.  The right table column joins to its corresponding left table column.
The physical name of a table on the left side of a relationship between two tables.
The physical name of a table on the right side of a relationship between two tables.
The possibility that a mass of soil will slip when these conditions are met: 1) vegetation is removed, 2) soil water is at or near saturation, and 3) other normal practices are applied.  Increasing the hazard of slippage but not considered in this rating are: 1) the undercutting lower portions or loading the upper parts of a slope or 2) altering the drainage or offsite water contribution to the site such as through irrigation.
The potential decrease of surface elevation as a result of the drainage of wet soils having organic layers or semifluid mineral layers.  (NSSH)
The potential of the soil to allow chemicals to leave the application site by leaching through the soil, as used in Florida state law.  Soils with a rating of High or Medium are considered to pose a potential leaching hazard.
The potential of the soil to allow chemicals to leave the application site with runoff water and/or detached soil particles, as defined for use in Florida.  Soils with a rating of High or Medium are considered to pose a potential runoff hazard.
The quantity of Carbonate (CO3) in the soil expressed as CaCO3 and as a weight percentage of the less than 2 mm size fraction.
The rating class term for the maximum of the representative values for the interpretation rating.
The rating class term for the minimum extreme of the interpretation rating.
The rating class term for the minimum of the representative values of the interpretation rating.
The rating of the map unit as a site for dwellings with basements, expressed as the dominant rating class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a site for dwellings with basements, expressed as the least limiting rating class for the map unit, based on the evaluation of each component in the map unit.
The rating of the map unit as a site for dwellings with basements, expressed as the most limiting rating class for the map unit, based on the evaluation of each component in the map unit.
The rating of the map unit as a site for dwellings without basements, expressed as the dominant rating class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a site for local roads and streets, expressed as the dominant rating class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a site for paths and trails, expressed as the dominant rating class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a site for septic tank absorption fields, expressed as the dominant rating class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a site for septic tank absorption fields, expressed as the least limiting rating class for the map unit, based on the evaluation of each component in the map unit.
The rating of the map unit as a site for septic tank absorption fields, expressed as the most limiting rating class for the map unit, based on the evaluation of each component in the map unit.
The rating of the map unit as a site for sewage lagoons, expressed as the dominant rating class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a site for sewage lagoons, expressed as the rating class for the dominant component in the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a source of sand, expressed as the dominant class for the map unit, based on composition percentage of each map unit component.
The rating of the map unit as a source of sand, expressed as the most probable class for the map unit, based on the evaluation of each component whose composition in the map unit is equal to or exceeds 15%.
The reference citation for a particular ecological classification scheme, typically a publication.
The relative potential erosion hazard for the map unit when used as a site for forest roads and trails, expressed as the rating class for the dominant component in the map unit, based on composition percentage of each map unit component.
The relative rating of the map unit for use as a disposal site of Manure and Food Processing Wastes, expressed as a weighted average of numerical ratings for individual components in the map unit.  The ratings are on a scale of 0.0 to 1.0, with the higher values indicating increasing limitations.
The relative rating of the map unit for use as paths and trails, expressed as a weighted average of numerical ratings for individual soil components in the map unit.  The ratings are on a scale of 0.0 to 1.0, with the higher values indicating more limitations.
The rupture resistance class of block-like specimens from the restrictive feature that have been air dried and then submerged in water.
The rupture resistance of a block-like specimen of 25 to 30 mm size that has been air dried and then submerged in water. (SSM)
The rupture resistance of a block-shaped specimen of 25 to 30 mm size and dry water state. (SSM)
The rupture resistance of a block-shaped specimen of 25 to 30 mm size and moist water state. (SSM)
The rupture resistance of an air dry plate-shaped specimen of specified size. (SSM)
The second category in the land capability classification system for irrigated soils.
The second category in the land capability classification system for nonirrigated soils.
The second level of Soil Taxonomy.  The suborder is below the order and above the great group.
The secondary iron oxides such as geothite, hematite, ferrihydrite, lepidocrocite and maghemite.  This form of iron may occur as discrete particles, as coatings on other particles, or as cementing agents between soil mineral grains.  It is iron extracted by dithionite-citrate.
The sequence in which the parent material occurs, when more than one parent material exists for one soil profile.  If only one parent material occurs for a soil, i.e. no lithologic discontinuities, no entry is required.
The shallowest depth to a wet soil layer (water table) at any time during the year expressed as centimeters from the soil surface, for components whose composition in the map unit is equal to or exceeds 15%.
The shallowest depth to a wet soil layer (water table) during the months of April through June expressed in centimeters from the soil surface for components whose composition in the map unit is equal to or exceeds 15%.
The soil moisture status for which the excavation difficulty class is assigned for the individual component.
The sum of NH4OAc extractable bases (pH 7.0), reported on less than 2mm base.
The sum of NH4OAc extractable bases plus KCl extractable aluminum.
The symbol used to uniquely identify the soil mapunit in the soil survey.
The targeted landuse for which the Map Unit was developed.  The properties of included mapunit components are tailored towards this landuse.
The taxonomic family temperature class used to construct the official classification name.  It may be null when the taxonomic family temperature class is embedded in the classification name.  The actual taxonomic temperature regime is recorded in another place.
The term to be displayed for the option to break ties by selecting the highest value.
The term to be displayed for the option to break ties by selecting the lowest value.
The third category in the land capability classification system for irrigated soils.
The third category in the land capability classification system for nonirrigated soils.
The third level of Soil Taxonomy.  The category is below the suborder and above the subgroup.
The type of bedrock from which the parent material was derived.
The type of detachment and removal of surface soil particles as largely affected by human activities. (SSM)
The typical soil moisture state of the layer, for the month in question.
The unique identifier of a record in the Component Forest Productivity table.  Use this column to join the Component Forest Productivity table to the Component Forest Productivity - Other table.
The unique identifier of a record in the Component Geomorphic Description table.  Use this column to join the Component Geomorphic Description table to the Component Microrelief Surface Morphometry table.
The unique identifier of a record in the Component Geomorphic Description table.  Use this column to join the Component Geomorphic Description table to the Component Slope Shape Surface Morphometry table.
The unique identifier of a record in the Component Geomorphic Description table.  Use this column to join the Component Geomorphic Description table to the Component Three Dimensional Surface Morphometry table.
The unique identifier of a record in the Component Geomorphic Description table.  Use this column to join the Component Geomorphic Description table to the Component Two Dimensional Surface Morphometry table.
The unique identifier of a record in the Component Month table.  Use this column to join the Component Soil Moisture table to the Component Month table.
The unique identifier of a record in the Component Month table.  Use this column to join the Component Soil Temperature table to the Component Month table.
The unique identifier of a record in the Component Parent Material Group table.  Use this column to join the Component Parent Material Group table to the Component Parent Material table.
The unique identifier of a record in the Component table.  Use this column to join the Component Canopy Cover table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Crop Yield table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Diagnostic Features table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Ecological Classification table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Erosion Accelerated table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Existing Plants table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Forest Productivity table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Geomorphic Description table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Hydric Criteria table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Interpretation table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Month table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Parent Material Group table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Potential Windbreak table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Restrictions table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Surface Fragments table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Taxonomic Family Mineralogy table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Taxonomic Family Other Criteria table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Taxonomic Moisture Class table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Text table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Component Trees To Manage table to the Component table.
The unique identifier of a record in the Component table.  Use this column to join the Horizon table to the Component table.
The unique identifier of a record in the Distribution Metadata table.  Use this column to join the Distribution Interp Metadata table to the Distribution Metadata table.
The unique identifier of a record in the Distribution Metadata table.  Use this column to join the Distribution Legend Metadata table to the Distribution Metadata table.
The unique identifier of a record in the Horizon Structure Group table.  Use this column to join the Horizon Structure table to the Horizon Structure Group table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon AASHTO table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Consistence table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Designation Suffix table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Fragments table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Pores table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Structure Group table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Text table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Texture Group table to the Horizon table.
The unique identifier of a record in the Horizon table.  Use this column to join the Horizon Unified table to the Horizon table.
The unique identifier of a record in the Horizon Texture Group table.  Use this column to join the Horizon Texture table to the Horizon Texture Group table.
The unique identifier of a record in the Horizon Texture table.  Use this column to join the Horizon Texture Modifier table to the Horizon Texture table.
The unique identifier of a record in the Legend Area Overlap Table.  Use this column to join the Mapunit Area Overlap table to the Legend Area Overlap table.
The unique identifier of a record in the Legend table.  Use this column to join the Distribution Legend Metadata table to the Legend table.
The unique identifier of a record in the Legend table.  Use this column to join the Legend Area Overlap table to the Legend table.
The unique identifier of a record in the Legend table.  Use this column to join the Legend Text table to the Legend table.
The unique identifier of a record in the Legend table.  Use this column to join the Mapunit table to the Legend table.
The unique identifier of a record in the Mapunit table.  Use this column to join the Component table to the Mapunit table.
The unique identifier of a record in the Mapunit table.  Use this column to join the Mapunit Area Overlap table to the Mapunit table.
The unique identifier of a record in the Mapunit table.  Use this column to join the Mapunit Crop Yield table to the Mapunit table.
The unique identifier of a record in the Mapunit table.  Use this column to join the Mapunit Text table to the Mapunit table.
The unique identifier of a record in the Mapunit table. It also serves as the non-connotative string of characters used to uniquely identify a record in the Mapunit Aggregated Attribute table as there is a one-to-one relationship between records in these two tables.  Use this column to join the Mapunit Aggregated Attribute table to the Mapunit table.
The unique identifier of a record in the Rule table in NASIS.
The unique identifier of the rule at the top of the interpretation rule hierarchy (the main rule).  Use this key to find the mail rule in the Component Interpretation table.
The unit of measure in which the annual productivity of forest overstory tree species is expressed.
The units of measure in which a column is recorded.
The units of measure in which layer depth range is specified (centimeters or inches), when layer depths are qualified by "Depth Range".
The units of measure in which the corresponding soil attribute is recorded.
The value of this attribute is set to true whenever any property used in an interpretation returns a default value in place of any null value.
The value of this attribute is set to true whenever any property used in an interpretation returns any null value.
The value of this attribute is set to true whenever any property used in an interpretation that is based on multiple observations returns inconsistent results for the low low value, the low representative value, the high representative value and the high high value.

A property always returns either a representative value or a low, high and representative value.  Values for low low, low representative, high representative and high high are only derived in the case where the values of a property used in an interpretation are based on multiple observations.
The value that should be substituted in lieu of a null value in the aggregation results for the corresponding soil attribute.  This value is populated when a null result should be interpreted as something other than null.  Examples include flooding and ponding frequency class, where a null value should be interpreted as "None", and depth to soil restrictive layer or depth to water table, where a null value should be interpreted as signifying that no restrictive layer or water table exists within a certain depth.
The vertical distance from mean sea level to a point on the earth's surface.
The volume percentage of the horizon occupied by the 2 mm or larger fraction (20 mm or larger for wood fragments), on a whole soil base.
The volumetric content of soil water retained at a tension of 1/10 bar (10 kPa), expressed as a percentage of the whole soil.
The volumetric content of soil water retained at a tension of 1/3 bar (33 kPa), expressed as a percentage of the whole soil.
The volumetric content of soil water retained at a tension of 15 bars (1500 kPa), expressed as a percentage of the whole soil.
The water content of the soil at the change between the liquid and plastic states.
Two dimensional slope segments of a hillslope that have similar geometric, erosional, or depositional characteristics.
Type of nearly continuous layer that has one or more physical, chemical, or thermal property(ies) that significantly reduce the movement of water and air through the soil or that otherwise provides an unfavorable root environment.
Windbreak tree height at age 20 years.