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Effect of Cropping Systems on Soil Physical Properties and Irrigation Requirements

The irrigation requirements for the period May-August were investigated in relation to some physical properties of Cecil soil as affected by eight cropping systems. These systems ranged from corn grown continuously with stalks removed to sod continuously. The cropping systems had no effect on particle size distribution and total porosity, but crust strength decreased and aggregate stability and infiltration rates increased as the quantity of plant material returned to the soil was increased. The increased water intake was offset by increased deep drainage from the root zone, so there was no change in subsequent irrigation requirements

² Research Agricultural Engineer and Head of Agronomy Department, University of Georgia (formerly Branch Chief), Athens, Ga., and Research Soil Scientists, USDA-ARS-SWC, Baton Rouge, La., and Watkinsville, Ga., respectively.

³ The assistance of Richard Montgomery, Jack Thomas, and David Lovell, Agricultural Research Technicians, in the conduct of this study is gratefully acknowledged.

Received for publication November 25, 1965.