Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 9/3/2006
Publication Date: 9/3/2006
Citation: Schumacher, T.E., Eynard, A., Lindstrom, M.J., Schumacher, J.A., Papiernik, S.K., Malo, D.D., Kohl, R.A., Lobb, D.A. 2006. Aggregate wettability and stability in an eroded landscape. Proceedings of International Soil Tillage Organisation 17th Triennial Conference, August 28-September 3, 2006, Kiel, Germany. p. 1474-1479.
Technical Abstract: Spatial patterns of soil loss within a field are often the result of several erosion agents acting in concert. The intensity of soil loss from specific erosion agents is spatially different. For example, high tillage erosion rates are mostly found on the crest and shoulders of hills while the most intense water erosion is found in the mid to lower backslope. However, there is a significant overlap of influence between erosion processes within regions of soil loss and deposition. Erosion processes also interact indirectly; for example, tillage erosion may change soil erodibility properties associated with water and wind erosion. Transects were established on relatively noneroded-grass and eroded-cultivated hillslopes. The pattern of current erosion rates on the cultivated field was established using a water and tillage erosion model (WATEM). Aggregate wettability and stability were compared between land use and within erosion zones in the cultivated field. Aggregate wettability and stability were related to soil organic carbon distribution within the landscape. Soil organic carbon distribution within the landscape was strongly influenced by past erosion and soil forming factors which in turn influences patterns of aggregate wettability and stability.