Yazar
Knud E Clausen
4 cilt bulundu.
Cilt sonuçları
Nursery selection affects survival growth of birch
Knud E. Clausen · Lake States Forest Experiment Station, U.S. Dept. of Agriculture
Sayfa sayısı yok · 1963
Birch / Seedlings / Growth
Selecting superior yellow birch trees
Knud E. Clausen · North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
10 sayfa · 1967
Selection / Birch
Yield and quality of seed from yellow birch progenies
Knud E Clausen · Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Sayfa sayısı yok · 1980
Seeds / Birch