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Effects of Nitrogen and Phosphorus Fertilizers on Deer Browsing and Growth of Young Douglas-fir
Glenn LeRoy Crouch
M. A. Radwan
出版
U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
, 1981
URL
http://books.google.com.hk/books?id=QQJHpA5ug8AC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
Nitrogen 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.
