Archive image from page 588 of A dictionary of modern gardening. A dictionary of modern gardening . dictionaryofmode01john Year: 1847 TRA 593 TRA Hardy deciduous shrubs. Layers. Peat and sandy loam. TRAILERS. See Creepers. TRAIN OIL. See Animal. Matters. TRAINING has for its object render- ing plants more productive either of flowers or of fruit, by regulating the number and position of their branches. If their number be too great, they over- shadow those below them, and by ex- cluding the heat and light, prevent that elaboration of the sap required for the production of fructification. If th
Archive image from page 588 of A dictionary of modern gardening. A dictionary of modern gardening . dictionaryofmode01john Year: 1847 TRA 593 TRA Hardy deciduous shrubs. Layers. Peat and sandy loam. TRAILERS. See Creepers. TRAIN OIL. See Animal. Matters. TRAINING has for its object render- ing plants more productive either of flowers or of fruit, by regulating the number and position of their branches. If their number be too great, they over- shadow those below them, and by ex- cluding the heat and light, prevent that elaboration of the sap required for the production of fructification. If they are too few, the sap is expended in the pro- duction of more, and in extending the surface of the leaves required for the digestion of the juices. The position of the branches is im- portant, because, if trained against a wall, they obtain a higher temperature, and protection from winds; and if trained with their points below the horizontal, the return of the sap is checked. Shy-flowering shrubs, as Di- placus puniceus, are made to blossom abundantly, and freely-flowering shrubs, as Cytisus hybridus, are made to blos- som earlier, by having their branches bent below the horizontal line. Dr. Lindley, observing upon these facts, proceeds to remark, that—' If a stem is trained erect, it will be more vigorous than if placed in any other position, and its tendency to bear leaves rather than flowers will be increased : in proportion as it deviates from the perpendicular is its vigour diminished. For instance, if a stem is headed back, and only two opposite buds are allowed to grow, they will continue to push equally, so long as their relation to the perpendicular is the same ; but if one is bent towards a horizontal direction, and the other al- lowed to remain, the growth of the former will be immediately checked ; if the depression is increased, the weak- ness of the branch increases proportion- ally ; and this may be carried on till the branch perishes. In training, this fact
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