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2. Archer, S.; Smeins, F.E. Ecosystem Level Processes. In Grazing Management: An Ecological Perspective; Heitschmidt, R.K., Stuth, J.W., Eds.; Timber Press: Port land, Oregon, 1991; 109 139.

3. Blackburn, W.H.; Pierson, F.B.; Hanson, C.L.; Thurow, T.L.; Hanson, A.L. The spatial and temporal influences of vegetation on surface soil factors in semiarid rangelands. Transc. ASAE 1992, 35, 479 486.

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