Effect of Cropping Intensity on Erosion and Infiltration1
- J. V. Mannering,
- L. D. Meyer and
- C. B. Johnson2
Soil loss and infiltration from corn (Zea mays L.), for rotations ranging in intensity from corn after 3 years of meadow to continuous corn, were measured on a silt loam soil of 5% slope. Intense simulated rainstorms were applied at three crop stages during each of 2 successive years. Infiltration rates for first- and second-year corn after grass-legume meadow were 32 and 26% greater, respectively, titan for continuous corn. The rate for third- and fourth-year corn was similar to that of continuous corn. Soil losses from first-, second-, third-, and fourth-year corn after meadow were 53, 83, 90, and 97%, respectively, of that from continuous corn. Two or 3 years of meadow were more effective than 1 year of meadow in maintaining high infiltration rates and reducing soil loss on first-year corn. Infiltration was 17% and 18% greater and soil losses were 40% and 32% less for corn ulster 2 and 3 years of meadow, respectively, than after 1 year of meadow. Residual influences of meadow-based rotations on water-stable aggregation statistically accounted for greater than 70% of the variance in soil loss.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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