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Title: Orchardgrass responses to fertilization of seven surface soils from the central Blue Mountains of Oregon.
Author: Geist, Jon M.;
Source: Res. Pap. PNW-RP-122. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 17 p
Publication Series: Research Paper (RP)
Description: Growth responses to application of all combinations of N, P, and S on four forest and three grassland soils showed that a significant N-S interaction existed for all seven soils. For two grassland soils, a significant response to phosphorus was obtained in combination with nitrogen and sulfur. The volcanic-ash-derived soils and the Klicker soil had the highest potential yield responses to fertilization.
Fertilization programs involved with soils which have chemical properties similar to these studied should consider only fertilizer sources which contain both N and S in all cases, and N, S, and P for certain grassland soils.
Keywords: fertilization (plants), soil fertility, nitrogen, sulphur
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Geist, Jon M. 1971. Orchardgrass responses to fertilization of seven surface soils from the central Blue Mountains of Oregon. Res. Pap. PNW-RP-122. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 17 p
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