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Effect of Initial Clod Size on Characteristics of Splash and Wash Erosion¹

ABSTRACT

Wash erosion increased as initial clod size increased from 0.5–2 mm to 8–30 mm on a Marshall silty clay loam except in the case of clods from continuous bromegrass (Bromus inermis). Wash losses increased as size increased despite a drop in runoff from the 8–30-mm clods. Final splash loss rates were higher from the 8–30-mm than from the smaller size clods from continuous corn (Zea mays). Splashed material was larger than washed material and both were larger than material forming the seal.

¹ Contribution from the Soil and Water Conservation Research Division, ARS, USDA, in cooperation with the Iowa Agr. Home Econ. Exp. Sta. (Journal Paper no. J-5858, Project no. 1064.).

² Soil Scientist, ARS, USDA, and Professor of Agronomy; and Instructor, Institut Pertanian Bogor, Indonesia.

Received for publication April 25, 1968. Accepted for publication July 15, 1968.