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Effects of nitrogen and phosphorus fertilizers on deer browsing and growth of young Douglas-fir.Author(s): Glenn L. Crouch; M.A. Radwan
Source: Res. Note PNW-RN-368. U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p
Publication Series: Research Note (RN)
Station: Pacific Northwest Research Station
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DescriptionNitrogen and phosphorus were applied to young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees to determine their effects on deer browsing and tree growth. Nitrogen (N) proauced measurable responses in browsing of terminal shoots and growth of trees the first year, but effects were mostly negligible 2 years after treatments. No responses to phosphorus (P) were detected. Nitrogen and N+P treatments increased the concentration of N in tree foliage the first year, but amount of moisture, ash, calcium, and P were not affected after 2 years.
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CitationCrouch, Glenn L.; Radwan, M.A. 1981. Effects of nitrogen and phosphorus fertilizers on deer browsing and growth of young Douglas-fir. Res. Note PNW-RN-368. U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p
KeywordsBrowse preference, nitrogen fertilizer response, phosphate fertilizer response, Douglas-fir, Pseudotsuga menziesii
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