Abstract
Abstract Using data from the Purdue University soil characterization laboratory and soil descriptions made by field soil scientists, we have developed a semi‐quantitative relationship between organic matter content and soil color for cultivated, silt loam soils of Indiana. This relationship is correct for about 90% of the samples examined and divides them in three categories: 5% organic matter. This is not a replacement for chemical analysis but a tool that could be of use when examining problems in the field. Journal paper No. 7606, Purdue University Agricultural Experiment Station.
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