. En vertu de l'irragation fruits Cirtus. Les agrumes, les fruits-culture. CTTRTT FRTTTTq TTNTnT 26^^TPPinAT7P TOM doit être fait à tous, il est habituellement préférable de couper les branches entièrement lorsqu'il s'unit à la mère ; d'un membre si la direction est lopped off partie en bas, une croissance dense de broussailles de résultats et plus l'élagage sera nécessaire plus tard. 24. Les différences variétales à l'élagage.-La lave- tonne orange Navel arbre qui a été cultivé à partir de bourgeons se sont réunis, tout a tendance à envoyer des branches dressées, vigoureux, qui, s'ils sont autorisés à rester, rob la sève de près par branches et développer

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. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 26 CTTRTT^ FRTTTTq TTNTnT7P TPPinAT^TOM needs to be done at all, it is usually better to cut the branch off entirely where it unites with the mother limb; if the branch is lopped off part way down, a dense growth of brush results and more pruning will be necessary later. 24. Varietal Differences in Pruning.—The Washing- ton Navel orange tree that has been grown from buds gathered promiscuously, has a tendency to send out vigorous, upright branches, which, if they are allowed to remain, rob the sap from near-by branches and develop so rapidly that they soon overtop the rest of the tree and form what is commonly known as the Australian type of navel. The Washington Navel orange tree grown from a bud selected from a good standard tree has very little of this tendency. Such growth should be vigorously sup- pressed. It may be discouraged by proper open-center pruning. 25. Season for Pruning.—Orange-tree pruning should follow the removal of the crop. The tree should be brought into good condition by blossoming time and then left severely alone until the fruit sets, with the exception that sprouts on the trunk, and stray branches should be removed whenever found. 26. Root Pruning.—Root pruning, as such, is never advisable for citrus trees. Roots are often cut or torn out dur- ing the process of subsoiling or of breaking up plow sole; such injury, however, is seldom serious enough to warrant the dis- continuance of such operations, if the deep plowing is done only along the middle of the rows. 27. Pruning Frosted Trees.—The pruning of frosted trees should be deferred until it is plain just how far back the wood has been killed. Young trees that have been only partly frozen usually show more injury in the rapidly growing upright shoots than in the fine fruiting wood. Such injured shoots had better be removed entirely, as a simple cutting back will result in a dense brush-like growth. Badly frozen trees a

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