. Bulletin . s are closely parallel, one or more can wellbe cut out. When these occur in pairs the weaker or less desirablelimb is the one to come out. When there are three parallel branchesit is usually the center one that can best be spared. 5. Never remove extremely large limbs of trees except for thepurpose of correcting the shape or form. Removal of large limbsthat let in the direct rays of the sun on branches previously shadedcauses sunscald and canker of the exposed limbs and often forcesout an objectionable sucker growth. 22 6. Cuts must be made close, smooth, and parallel to generaldi
. Bulletin . s are closely parallel, one or more can wellbe cut out. When these occur in pairs the weaker or less desirablelimb is the one to come out. When there are three parallel branchesit is usually the center one that can best be spared. 5. Never remove extremely large limbs of trees except for thepurpose of correcting the shape or form. Removal of large limbsthat let in the direct rays of the sun on branches previously shadedcauses sunscald and canker of the exposed limbs and often forcesout an objectionable sucker growth. 22 6. Cuts must be made close, smooth, and parallel to generaldirection of the limb from which the branch is being removed. Inmaking large cuts these precautions are very important to secureproper healing and to prevent decay. 7. When watersprouts or suckers occur most of them shouldbe removed, but their presence in large numbers indicates too heavypruning or at least pruning of the wrong kind. When a largeopening occurs in a tree, it can sometimes be filled by allowing a. Fig. 13.—Apple tree ruined by continuous improper pruning. The main branches start in awhorl forming a weak head. Annual heading-back pruning has multiplied branches until thetop resembles a hedge and practically no fruiting wood is present. (Courtesy W. F. Rofkar.) few well spaced water sprouts to grow. They can be cut back tosuppress extremely vigorous growth and to cause branching atproper places, after which the pruning should be the same as forthe rest of the tree. Pruning for Shape of Tree.—Quite commonly a grower who isdealing with young bearing trees worries a lot about them, becausethey seem to be growing too tall. Frequently he does not realizethat a good crop of fruit will bend the limbs down so that thetrouble is corrected naturally and at the same time fruit of high 23 quality is produced. Depend entirely on thinning to keep a treelow. This allows the lower branches to keep up with the upperones and produces continued f ruitf ulness. After bearing several
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