. Bulletin. Forests and forestry -- United States. 32 A PRIMER OF FORESTRY. twenty years before. The yield of the whole forest in spruce for a single year may be cut each year from one-twentieth of the whole area. If all the divisions were cut over live times in the life of a mature tree, then one-fifth of the standing timber would be taken. Fig. 19.—Group of spruce under beech. Germany. from each division at each cutting. Thus, if it took one hundred years for a tree to become ripe for the ax, the cutting (at intervals of twent}^ years) would return five times during the life of the tree, at
. Bulletin. Forests and forestry -- United States. 32 A PRIMER OF FORESTRY. twenty years before. The yield of the whole forest in spruce for a single year may be cut each year from one-twentieth of the whole area. If all the divisions were cut over live times in the life of a mature tree, then one-fifth of the standing timber would be taken. Fig. 19.—Group of spruce under beech. Germany. from each division at each cutting. Thus, if it took one hundred years for a tree to become ripe for the ax, the cutting (at intervals of twent}^ years) would return five times during the life of the tree, at its twentieth, fortieth, sixtieth, eightieth, and one hundredth j^ 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 United States. Division of Forestry. Washington : G. P. O.
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