. A treatise on pruning forest and ornamental Fig. 13. —Cor-rect form of headfor a tree forty toeighty years old. be sufficiently shortened to check their excessivegrowth at the expense of the leader, without, how-ever, being so reduced as to impair the vigor ofgrowth of the tree. 2. The head of the middle-aged tree should forman oval less elongated than that necessary for treesof the first class. The height of the trunk shouldequal one-third to two-fifths of the height of thetree (Fig. 13). 3. The head of the old tree (Fig. 14) should begradually rounded in outline ; the trunk may, in
. A treatise on pruning forest and ornamental Fig. 13. —Cor-rect form of headfor a tree forty toeighty years old. be sufficiently shortened to check their excessivegrowth at the expense of the leader, without, how-ever, being so reduced as to impair the vigor ofgrowth of the tree. 2. The head of the middle-aged tree should forman oval less elongated than that necessary for treesof the first class. The height of the trunk shouldequal one-third to two-fifths of the height of thetree (Fig. 13). 3. The head of the old tree (Fig. 14) should begradually rounded in outline ; the trunk may, insome cases, be made to reach a height equal to halfthe height of the tree, which has now probably ceasedto grow upwards. ITS AIMS AND METHODS. 21 4. Veterans (Fig. 15). Trees classed as veteranshave generally ceased to increase in size. They. ] \ Fig. 14. — Correct form ofhead for a tree eighty to onehundred and fifty years old.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpruning, bookyear1906
