Field Book for Describing and Sampling Soils (Version 3.0)
National Soil Survey Center / Natural Resources Conservation Service / U. S. Department of Agriculture
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...