Parameters for Characterizing Tillage‐induced Soil Surface Roughness

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Abstract
Tillage‐induced soil roughness is an important consequence of tillage because water and air transport phenomena are affected. Characterizations of roughness have been statistical in nature and have lacked a physical connection to the configuration features affected by roughness. A new method of analyzing microrelief data is presented that improves the description of the soil surface and should lead to better information about the physical processes affected by tillage. The new procedure results in two surface configuration parameters, limiting slope (LS) and limiting elevation difference (LD), that are based on the slope or inclination of the surface of soil clods and to the average relief (elevation difference), respectively. These two indexes are directly related to the configuration of the surface and also sensitive to differences in roughness. They should help allow roughness to be used simultaneously with other soil properties to predict transport phenomenon.

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