Guides for Editing Soil Properties

The following table contains links to reference sources that are used to populate and edit soil property data in NASIS. Many of these sources are links to the National Soil Survey Handbook (NSSH). Some soil properties have links to supplemental guides that are intended to enhance (not replace) the guidance in the NSSH. The purpose of this table is to provide a common source of reference guides for all data editors with the intent of achieving and maintaining consistency with their NASIS edits.

Some of the following documents require Microsoft Word.

Soil Property	NSSH Guide	Supplemental Guide
Acidity, Extractable	618.24	None
Air Temperature, Mean Annual (Climatic Setting)	618.10(c)	None
Albedo, dry	618.04	None
Aluminum, Extractable	618.25	None
Available Water Capacity (AWC)	618.05	Reduction of AWC due to rock fragments and salts Ranges of AWC in relation to soil texture and organic matter
Bulk Density, 1/10 or 1/3 bar	618.06	Estimating moist bulk density by texture
Bulk Density, 15 bar	618.07	None
Calcium Carbonate Equivalent	618.08	None
Cation Exchange Capacity, NH4OAc pH7	618.09	None
Cation Exchange Capacity, Effective	618.17	None
Coefficient of Linear Extensibility (COLE) Percent	618.37	Calculated Coefficients of Linear Extensibility for 20-69% clay
Effective Cation Exchange Capacity	618.17	None
Elevation	618.19	None
Evapotranspiration, Daily Average Potential (Climatic Setting)	618.10(e)	None
Extractable Acidity	618.24	None
Extractable Aluminum	618.25	None
Flooding Frequency, Duration, and Month	618.26	None
Fragments in the Soil (rock, pararock, and wood)	618.27	Under development
Fragments, Surface	618.61	None
Free Iron Oxides	618.28	None
Frost Free Period (Climatic Setting)	618.10(a)	None
Gypsum	618.30	None
Horizon, Depth to Bottom	618.31	None
Horizon, Depth to Top	618.32	None
Horizon Designation	618.33	Methods for Populating Horizon Nomenclature in NASIS
Horizon Thickness	618.34	None
Hydraulic Conductivity, Saturated	618.50	Saturated hydraulic conductivity in relation to soil texture Estimating Water Movement Through Lithic and Paralithic Materials
Iron Oxides, Free	618.28	None
Landform	618.36	None
Linear Extensibility Percent	618.37	Calculated Coefficients of Linear Extensibility for 20-69% clay
Liquid Limit	618.38	Use NASIS Calculation "Liquid Limit and PI"
MAAT (Mean Annual Air Temperature) (Climatic Setting)	618.10(c)	None
Moisture Status, Soil	618.57	None
Organic Matter	618.39	Estimated Organic Carbon = Total Carbon - (0.12 × CaCO3 equivalent)
Oxides, Free Iron	618.28	None
Parent Material -- Kind, Modifier, and Origin	618.40	None
Particle Density	618.41	None
Particle Size	618.42	None
Percent Passing Sieves	618.43	Determination of Grain Size Distribution
pH (Soil Reaction)	618.47	None
Plasticity Index	618.44	Use NASIS Calculation "Liquid Limit and PI"
Ponding Depth, Duration, Frequency Class, and Month	618.45	None
Pores	618.46	None
Precipitation, Daily Average (Climatic Setting)	618.10(d)	None
Precipitation, Mean Annual (Climatic Setting)	618.10(b)	None
Reaction, Soil (pH)	618.47	None
Restriction Kind, Depth, Thickness, and Hardness	618.48	None
Saturated Hydraulic Conductivity	618.50	Saturated hydraulic conductivity in relation to soil texture Estimating Water Movement Through Lithic and Paralithic Materials
Sieves, Percent Passing	618.43	Determination of Grain Size Distribution
Temperature, Air, Mean Annual (Climatic Setting)	618.10(c)	None
Slope Aspect	618.51	None
Slope Gradient	618.52	None
Slope Length	618.53	None
Sodium Adsorption Ratio	618.54	None
Soil Moisture Status	618.57	None
Soil Temperature	618.59	None
Subsidence, Initial and Total	618.60	None
Surface Fragments	618.61	None
Temperature, Air, Mean Annual (Climatic Setting)	618.10(c)	None
Temperature, Soil	618.59	None
Texture Class	618.67(f)	None
Texture Modifier	618.67(h)	None
Texture, Terms Used in Lieu of Texture	618.67(g)	None
Water, One-Tenth Bar	618.68	None
Water, One-Third Bar	618.69	None
Water, 15 Bar	618.70	None
Water, Satiated	618.71	None

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