PALMERRobert G. Palmer is Manager of Agronomy Service Support at Pioneer Hi-Bred International in Tipton, Indiana. His publications include professional articles in the area of soil management and conservation, four previous versions of this manual, and crp managament and other guides developed for use by agronomists in the field. Frederick R. Troeh is Professor of Agronomy at Iowa State University where he has taught since 1963. His publications include, professional journal articles in the area of soil science, four previous versions of this manual, several versions of a laboratory manual for the course in soil fertility, three editons of Soils and Soil Fertility, a textbook for introductory soils course, and two editions of Soil and Water Conservation, a textbook for the course in soil conservation. Read More Read Less
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