Soils vary so much in type, even within a single field, that it is often difficult on agricultural research stations to select suitable sites for field trials. One answer to this problem is to make a detailed soil map of the experimental area, using factors of agronomic importance based on the soil profile in deciding categories for mapping.
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References
1.
Anon. (1951). Soil Survey Manual. United States Department of Agriculture Handbook No. 18, 280-7.
