Infiltration as Influenced by Tillage-Induced Random Roughness and Pore Space1
- R. E. Burwell and
- W. E. Larson2
During simulated rainfall, increases in tillage-induced random roughness and pore space increased water infiltration before runoff started but did not significantly influence infiltration throughout a 5-cm runoff period. Random roughness provided a greater accounting of infiltration variation among tillage treatments to initial runoff than did total pore volume of the tilled layer.
Freshly turnplowed alfalfa-bromegrass sod on Barnes loam and Nicollet sandy clay loam soil provided random roughness and pore space conditions that could accommodate without “failure” the major portion of rainfall energy (as evidenced by EI) expected in west central and southwestern Minnesota during the first 2 months following row crop planting. This is the critical runoff-erosion period in the Corn Belt.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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