Urea fertilizer increases growth of 20-year-old, thinned Douglas-fir on a poor quality site
By: by Richard E. Miller and Donald L. Reukema
Contributors: Reukema, Donald L., jt. auth; Pacific Northwest Forest and Range Experiment Station (Portland, Or.); United States. Forest Service
Series: USDA Forest Service research note PNW ; 291
Publisher: Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Published: 1977
Place of publication: Portland, Oregon
Language: eng
Subjects: Douglas fir; Forest thinning; Forest soils -- Fertilization; Urea as fertilizer
Notes: Caption title

Bibliography: p. 8