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Guides for Editing Soil Properties

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 or Adobe Acrobat.

Soil Property NSSH Guide Supplemental Guide
Air Temperature, Mean Annual (Climatic Setting) 618.10(c) None
Albedo, dry 618.04 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

Adobe Acrobat Document AWC Guidelines for Sandy Textures
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 618.32 None
Horizon, Depth to Top 618.33 None
Horizon Designation 618.34 Microsoft Word DocumentMethods for Populating Horizon Nomenclature in NASIS
Horizon Thickness 618.35 None
Hydraulic Conductivity, Saturated 618.50 Saturated hydraulic conductivity in relation to soil texture

Estimating Water Movement Through Lithic and Paralithic Materials
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)
Parent Material -- Kind, Modifier, and Origin 618.41 None
Particle Density 618.42 None
Particle Size 618.43 None
Percent Passing Sieves 618.44 Determination of Grain Size Distribution
pH (Soil Reaction) 618.48 None
Plasticity Index 618.45 Use NASIS Calculation "Liquid Limit and PI"
Ponding Depth, Duration, Frequency Class, and Month 618.45 None
Pores 618.47 None
Precipitation, Daily Average (Climatic Setting) 618.10(d) None
Precipitation, Mean Annual (Climatic Setting) 618.10(b) None
Reaction, Soil (pH) 618.48 None
Restriction Kind, Depth, Thickness, and Hardness 618.49 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 618.44 Determination of Grain Size Distribution
Temperature, Air, Mean Annual (Climatic Setting) 618.11 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 618.62 None
Temperature, Air, Mean Annual (Climatic Setting) 618.11(c) None
Temperature, Soil 618.59 None
Texture Class 618.68(f) None
Texture Modifier 618.68(h) None
Texture, Terms Used in Lieu of Texture 618.68(g) None
Water, One-Tenth Bar 618.69 None
Water, One-Third Bar 618.70 None
Water, 15 Bar 618.71 None
Water, Satiated 618.72 None