Yazar
John C Bjorkbom
11 cilt bulundu.
John C. Bjorkbom · Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1973
Paper birch / Nutrition / Requirements
John C. Bjorkbom · Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1973
Paper birch / Nutrition / Trees / Seedlings
John C Bjorkbom · Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
24 sayfa · 1977
Forest ecology
John C. Bjorkbom · U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
13 sayfa · 1986
Hardwoods / Logging / Reforestation
John C. Bjorkbom · Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
12 sayfa · 1968
Paper birch
John C. Bjorkbom · Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
Sayfa sayısı yok · 1972
Paper birch
John C. Bjorkbom · Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
15 sayfa · 1967
Seeds / Paper birch
John C. Bjorkbom · Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
10 sayfa · 1972
Paper birch
John C. Bjorkbom · Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1979
Fertilizers -- Pennnsylvania / Hardwoods -- Pennsylvania
John C. Bjorkbom · Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
10 sayfa · 1979
Forest regeneration -- Allegheny Mountains