ABSTRACT:
Use of an actual on-site value for equivalent vegetative cover (V) in the wind erosion equation provides an acceptable estimate of the annual soil loss that might occur at that site if V and the other factors that affect wind erosion do not change significantly during that year. But, if the equation is used to calculate potential soil losses (E) before the residue-producing crop is planted, for example, when planning the spacing of annual or perennial wind barriers in strip-cropping, the probable year-to-year variation in that crop's residue yield must be taken into account or a serious underestimation of potential soil losses can result. A technique to account for this probable variation is presented, along with an example of its use in determining wind-barrier spacing.
Footnotes
J. D. Bilbro is a research agronomisi with the Cropping Systems Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Big Spring, Texas 79720.
- Copyright 1985 by the Soil and Water Conservation Society
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