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MO5 Soil Technical Note-15

Central Great Plains MLRA Region 5
MO5 Soil Technical Note-15

March 19, 2009

Subject: SOI – Guide for Determining Textural Modifiers

Purpose. To provide the Central Great Plains Major Land Resource Area (MLRA) Office Region 5 (MO5) with a field reference guide and a quick link to a National Soil Survey Center (NSSC) Microsoft (MS) Excel spreadsheet for determining the correct textural class modifiers for soils with multiple sizes of coarse fragments

A link to a MS Excel spreadsheet that calculates the correct textural modifier for soils that contain multiple sizes of coarse fragments can be found in Exhibit 618-11, Table 1, Guide for Determining Rock Fragment Modifier of Texture, of the National Soil Survey Handbook (NSSH). A copy of this spreadsheet can be downloaded onto a field computer.

When a computer is not available, the attached chart can be printed and used in the field as a handy reference when describing soils with many different sizes of coarse fragments. This guide was developed and used in Colorado for many years. It can be printed and carried.

/s/

CLEVELAND E. WATTS
State Soil Scientist/MO Leader

DIST: SS (MO5), MO Leaders – TX – CO – ND – MN – AR

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Attachment (PDF; 409 KB)