. The practice of silviculture : with particular reference to its application in the United States . Forests and forestry. METHODS OF MAKING TfflNNINGS 171 Interlttcalion or Accretion Cuttings. —Accretion cuttings are classed as the heaviest grade of thinnings and like other thin- nings are not intended to make permanent gaps in the cover. Their purpose is to obtain exceptionally rapid diameter growth of individual trees, not attainable with lighter Fig. 68. The same stand as shown in Fig. 66, but immediately after a D grade thinning, removing overtopped, intermediate and many co-d
. The practice of silviculture : with particular reference to its application in the United States . Forests and forestry. METHODS OF MAKING TfflNNINGS 171 Interlttcalion or Accretion Cuttings. —Accretion cuttings are classed as the heaviest grade of thinnings and like other thin- nings are not intended to make permanent gaps in the cover. Their purpose is to obtain exceptionally rapid diameter growth of individual trees, not attainable with lighter Fig. 68. The same stand as shown in Fig. 66, but immediately after a D grade thinning, removing overtopped, intermediate and many co-dominant trees. Note that the crown canopy has been opened and every one of the remaining trees given increased room on one or more sides. Compare with Figs. 67 and 77. They are needed particularly with light demanding species, for shade enduring trees grow rapidly following lighter thin- nings. In making accretion cuttings there is great danger of reducing the volume production per acre, although the in- creased value of the large trees may offset financially any such 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
