ABSTRACT:
Use of conventional and conservation tillage systems and their effect on corn and soybean growth were investigated at the Southeastern Iowa Conservation Tillage Research Project. A southeastern Iowa farmer conducted field operations and made crop management decisions on 1.3-hectare (3-acre) field plots using his own materials and machinery. Research personnel measured crop growth and soil properties and monitored field operations. Results indicated that high amounts of rainfall may have negative impacts on no-till corn grown on the poorly drained soils in the study area. Soybean yields were not affected significantly by tillage method. Stratification of phosphorus and potassium in surface soil layers was observed in conservation tillage systems.
Footnotes
R. M. Cruse is an assistant professor and G. A Yakle is a research associate, Department of Agronomy, Iowa State University, Ames, Iowa 50011; T. C. Colvin is an agricultural engineer, Agricultural Research Service, U.S. Department of Agriculture, and an assistant professor, Department of Agricultural Engineering, Iowa State University; D. R. Timmons is a soil scientist, ARS, USDA, and an assistant professor, Department of Agronomy, Iowa State University; and A. L. Mussleman is an agricultural programs supervisor, Southeastern Community College, West Burlington, Iowa 52635.
- Copyright 1983 by the Soil and Water Conservation Society
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