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J. R. Simanton, M. A. Weltz, H. D. Larsen, Rangeland Experiments to Parameterize the Water Erosion Prediction Project Model: Vegetation Canopy Cover Effects, Journal of Range Management, Vol. 44, No. 3 (May, 1991), pp. 276-282
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Simanton et al. (1991) studied this question.
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