WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Sunday, January 20, 2019


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Search results on 01/20/19

3070. Tanaka, D.L. and J.K. Aase. 1989. Influence of topsoil removal and fertilizer application on spring wheat yields.. Soil Sci. Soc. Am. J. 53:228-232.
In 3 of 5 years, soil removal treatments reduced spring wheat yields an average of 9, 28, and 45% for 0.06, 0.12, and 0.18 m soil removal treatments, respectively, over all fertilizer treatments. The data suggest that P was the most limiting nutrient and additions of N fertilizer without P resulted in small yield increases.

10546. Rasmussen, P.E. and C.L. Douglas Jr.. 1991. Effect of rill erosion during early vegetative growth on winter wheat yield.. Agron. J. 83:729-732.
Rill erosion effects on winter wheat growth and yield were determined in six fields where rill erosion occurred during early vegetative growth. Rill erosion reduced head density, dry matter yield, N uptake, and grain yield at all sites. The rill/non-rill grain yield ratio varied from 0.84 to 0.94. The estimated yield reduction per ha associated with average rill development was between 0.9 and 1.2%. Assuming a 36 Mg/ha soil loss, the calculated yield reduction from winter wheat fields yielding 5.2 Mg/ha is 88 kg grain/ha (about $13/ha for wheat valued at $0.147). This erosion cost would encompass a significant percentage of the landscape with sloping topography and is additional to any costs associated with long-term loss of soil productivity.

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