Precipitation effects on ridges created by grain drills

Abstract

ABSTRACT: The influence of precipitation on soil ridge height persistence was measured at 15 sites in five counties across Kansas. Multiple regression equations were developed to describe how ridges created by grain drills change in height over time. Cumulative precipitation was the major factor affecting ridge persistence. Secondary factors were soil texture (sand, silt, clay), soil organic matter, and exchangeable calcium. These results will be useful in modeling wind erosion across ridged surfaces and in determining the soil ridge roughness factor in the present wind erosion equation.