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john d walstad
4 cilt bulundu.
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Forest vegetation management for conifer production
John D. Walstad · Wiley
523 sayfa · 1987
Weed control / Forest management / Conifers / Forests and forestry / Forest policy
The health risks of herbicides in forestry
John D. Walstad · Forest Research Lab, College of Forestry, Oregon State University
60 sayfa · 1984
Environmental aspects / Environmental aspects of Herbicides / Environmental aspects of Phenoxy groups / Forests and forestry / Health aspects
Weed control for better southern pine management
John D. Walstad · Southern Forestry Research Center, Weyerhaeuser Co.
44 sayfa · 1976
Forest management / Southern pines / Weed control
Natural and prescribed fire in Pacific Northwest forests
John D. Walstad, Steven R. Radosevich, David V. Sandberg · Oregon State University Press
317 sayfa · 1990
Forest fires / Prescribed burning / Fire ecology / Forest ecology