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What Is Being Taught in Introductory Soil Science Laboratories?¹

Synopsis: The following sequence of 10 most important topics, with the number of schools teaching each topic, was stressed: texture—65, moisture—60, soil reaction (pH) and limestone—58, rocks and minerals—56, structure-55, profile study-54, classification and survey—54, soil testing—51, microorganisms and organic matter—50, and fertilizers—47. Almost two-thirds of the instructors provided at least as many hours in the laboratory as in the lecture. General chemistry was the most common prerequisite for the introductory soil science courses.

² Assistant Professor, Department of Agronomy, University of Illinois, Urbana.