WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Thursday, July 19, 2018

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187. Allamaras, R.R., S.C. Gupta, J.L. Pikul and C.E. Johnson.. 1980. Soil erosion by water as related to management of tillage and surface residues.. USDA-ARS, Oakland, CA..
Soil erosion by water was estimated for combinations of tillage and residue handling, terracing, and contouring. The Universal Soil Loss Equation was applied for conservation planning. Slope steepness primarily determined which combination of management practices was needed. Erosion could not be held below tolerance values for wheat-fallow sequences on slopes exceeding 20%. T: Distribution of K values within cropland of study area. Cover and management (C) values for study area. Tillage operations in wheat-fallow rotation, and associated reduction in surface residue.

5030. Papendick, R.I.. 1984. Soil conservation and management in the Palouse. p. 234-244.. IN: B.R. Bertramson (ed.). History of the Dept. of Agronomy and Soils, WSU, Pullman, WA.
An historical overview.

5725. Rasmussen, V.P. and R.L. Newhall. 1989. High residue conservation tillage increases soil moisture and profits. IN: Utah Agricultural Statistics, 1989. p. 121-124. Utah Agricultural Statistics Service, Salt Lake City, UT.
Three years of data are reported for several locations comparing a number of consevation tillage and cropping systems. The no-till and chemical fallow were better both for conserving soil and moisture, and generated the highest net returns. The chem fallow conserved about 1-2 inches of soil moisture. Erosion under the no-till chem fallow ranged from 1-5 T/ac compared to 17-30 T/ac with conventional tillage. The study included tests of continuous cropping, but more years are needed to make an economic comparison.

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