. The practice of silviculture : with particular reference to its application in the United States . Forests and forestry. i84 INTERMEDIATE CUTTINGS — THINNINGS merchantable trees so dense as to be in danger of stagnation of growth unless thinned, furnish an ; The indi- vidual trees may stand so closely together that it is a laborious task to reach and cut each individual that should be removed in the thinning. Instead of attempting this narrow lanes three to four feet in width may be clear cut, running through the stand at intervals of 5 to 10 feet. The cutting can be done i
. The practice of silviculture : with particular reference to its application in the United States . Forests and forestry. i84 INTERMEDIATE CUTTINGS — THINNINGS merchantable trees so dense as to be in danger of stagnation of growth unless thinned, furnish an ; The indi- vidual trees may stand so closely together that it is a laborious task to reach and cut each individual that should be removed in the thinning. Instead of attempting this narrow lanes three to four feet in width may be clear cut, running through the stand at intervals of 5 to 10 feet. The cutting can be done in the lanes easily and quickly. (See Fig. 74.) In dense stands of merchantable size there is space enough to cut through the trunk with the axe or saw, but the severed. Fig. 74. A thinning in an unmerchantable stand 15 years of age and so dense as to reqiure immediate treatment. Narrow lanes were cut through the stand and the trees felled into and left lying in these lanes. Not an ideal method of thin- ning, but done to reduce the cost to a reasonable amount. Windrows of felled trees are indicated by crosshatching. tree remains standing upright and it is difficult to bring it to the ground. Such a condition occurs only with shade en- during species like red spruce (Picea rubens) having stiff branches, which often persist on the trees for years after death. In a dense stand of red spruce, 30 to 60 years of age, it may be impossible to bring a severed tree to the ground except by dragging the butt away from the stump (usually with the aid of horses), until the top is pulled loose from the surrounding crowns. This is too expensive an operation. Cutting clear of lanes wider than those in young urmierchant- able stands is advised.^ The lanes may be 8 to 10 feet wide with uncut strips 10 to 18 feet in between. The difficulty of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of t
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforestsandforestry
