WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, April 23, 2018

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231. Allmaras, R.R., C.L. Douglas and K. Ward. 1976. More infiltration, less runoff and evaporation.. OR Agr. Expt. Sta. Special Report 459.

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.

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