Pamphlets on Forestry, Volume 61991 |
From inside the book
Results 1-3 of 17
Page 4
... Spruce - bud Tortrix described in my last report was concerned in the widespread destruction of spruce and fir in those important lumbering regions . The result showed that this caterpillar , which has in former years been so ...
... Spruce - bud Tortrix described in my last report was concerned in the widespread destruction of spruce and fir in those important lumbering regions . The result showed that this caterpillar , which has in former years been so ...
Page 6
spruce , and by the processes of natural selection the weak qualities of other evergreen trees have apparently been eliminated from it ; it has survived and persisted by reason of its unusual powers of endurance , its toughness , and ...
spruce , and by the processes of natural selection the weak qualities of other evergreen trees have apparently been eliminated from it ; it has survived and persisted by reason of its unusual powers of endurance , its toughness , and ...
Page 40
... spruce , pine , and other species may be sown with agricultural crops . I have had remarkable suc- cess with sowing spruce with white beans and peas . The second method of forest - forming is by planting . Plant- ing may be practiced ...
... spruce , pine , and other species may be sown with agricultural crops . I have had remarkable suc- cess with sowing spruce with white beans and peas . The second method of forest - forming is by planting . Plant- ing may be practiced ...
Common terms and phrases
acres agri agricultural annual bark beetles borer branches Castanea cedar swamp cent city boys climate Committee Connecticut course covered crop cultivated deciduous destruction eggs estry European farm experience farm practice farmer boys feet high foliage forest reserves forestry grafted growing growth important inches in diameter industries insects interest Japanese Japanese chestnut lake large number larva larvæ leaves Luther Burbank maple mountain National Business League nature NORWAY SPRUCE nursery organization owners Parry Bros Pinus pitch pine Planters of America planting portion present President profitable protection pupa purpose Quercus red cedar reforest the country reforestation region Ridgely sand seed seedlings soil South Jersey Southern Interior sowing species sprouts spruce streams stump supply surveys tax land thin timber tion tract Tree Planters United valuable varieties waste white cedar white pine wind wood lot woodland Zon's