. The practice of silviculture : with particular reference to its application in the United States . Forests and forestry. APPLICATION OF TfflNNINGS 187 of growth on good soils. As the stand grows older the mter- val between thinnings is apt to lengthen, because growth may slow up and the openings in the canopy average larger due to the larger crown spread of single older Fig. 77. The same stand as shown in Fig. 68, but 10 years after the D grade thinning was made. The crown canopy is aknost complete. The stand is in need of a second thinning. Thinnings should be carried on systematica
. The practice of silviculture : with particular reference to its application in the United States . Forests and forestry. APPLICATION OF TfflNNINGS 187 of growth on good soils. As the stand grows older the mter- val between thinnings is apt to lengthen, because growth may slow up and the openings in the canopy average larger due to the larger crown spread of single older Fig. 77. The same stand as shown in Fig. 68, but 10 years after the D grade thinning was made. The crown canopy is aknost complete. The stand is in need of a second thinning. Thinnings should be carried on systematically from early in the life of the stand imtil the period of regeneration, fol- lowing a definite poKcy. What method of thinning should be used and how severe the thinnings ought to be made, must be determined separately for each case. All that can be attempted here is to indicate the procedure in some of the commoner Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hawley, Ralph C. (Ralph Chipman), 1880-. New York : John Wiley & Sons, Inc.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforestsandforestry
