Yazar
James S Hadfield
5 cilt bulundu.
Cilt sonuçları
Douglas-fir dwarf mistletoe
James S. Hadfield · U.S. Dept. of Agriculture, Forest Service
Sayfa sayısı yok · 2000
Douglas fir / Diseases and pests
1992 Umatilla and Wallowa-Whitman National Forests Western Spruce Budworm Suppression project
James S. Hadfield · USDA Forest Service, Forest Pest Management
12 sayfa · 1993
Western spruce budworm / Control
1993 Warm Springs Indian Reservation western spruce budworm suppression project
James S. Hadfield · USDA Forest Service, Forest Pest Management
17 sayfa · 1993
Western spruce budworm / Control
Root diseases in Oregon and Washington conifers
James S. Hadfield · USDA Forest Service, Pacific Northwest Region Forest Pest Management
27 sayfa · 1986
Roots (Botany) / Diseases and pests / Root rots / Conifers
Laminated root rot
James S Hadfield · U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Region
15 sayfa · 1977
Root rots / Trees / Diseases and pests