Field Book for Describing and Sampling Soils (Version 3.0) National Soil Survey Center

From the foreword: Purpose: The following instructions, definitions, concepts, and codes are a field guide for making or reading soil descriptions and sampling soils as presently practiced in the USA. (Note: References cited in the foreword are listed at the end of Chapter 1 [p. 1-31].) Background: Soil description methodology was developed by soil scientists throughout the entire course of the soil survey. The USDA published small instruction booklets for field parties, including soil descriptions, in 1902-1904, 1906, and 1914. The first USDA guide for soil horizon identification and description was released in 1937 (Bureau of Chemistry and Soils, 1937). Dr. Roy Simonson and others later summarized and revised this information (Soil Survey Staff, 1951; Soil Survey Staff, 1962). Brief "color-book" inserts with shorthand notation were released by the Soil Conservation Service (Spartanburg, SC, 1961; Western Technical Center, Portland, OR, 1974). Previous Field Books were released in... Это и многое другое вы найдете в книге Field Book for Describing and Sampling Soils (Version 3.0) (National Soil Survey Center)