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Planting Engelmann Spruce
Frank Ronco
其他書名
A Field Guide
出版Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1972
URLhttp://books.google.com.hk/books?id=neTDm5cZDLIC&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN
註釋This field guide was prepared to provide the planted with the techniques needed to establish Engelmann spruce seedlings successfully. Planting principles are discussed in detail in USDA Forest Service Research Paper RM-89, 'Planting Engelmann spruce, ' which emphasizes the relationship between the physiological and silvicultural requirements of spruces and the environmental conditions to which seedlings are exposed.