Yazar
James W Edgren
4 cilt bulundu.
Cilt sonuçları
Growth of frost-damaged Douglas-fir seedlings
James W. Edgren · Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service
Sayfa sayısı yok · 1970
Douglas fir / Growth / Frost damage / Seedlings / Trees
Growth of Douglas-fir, ponderosa pine, and western larch seedlings following seed treatment with 30 percent hydrogen peroxide
James W. Edgren · Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service
Sayfa sayısı yok · 1970
Seeds / Ponderosa pine / Western larch / Douglas fir / Seed treatment
Field survival and growth of Douglas-fir by age and size of nursery stock
James W Edgren · Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Sayfa sayısı yok · 1977
Douglas fir / Nurseries (Horticulture)
Potential damage to forest tree seed during processing, protective treatment, and dissemination
James W. Edgren · Pacific Northwest Forest and Range Experiment Station, U.S. Forest Service
Sayfa sayısı yok · 1968
Seeds / Douglas fir / Handling / Processing / Viability