. The American fruit culturist. nd to correspond exactly withthe time since the operation was performed. The descent of the elaborated sap in theinner bark may be shown by tying a ligaturearound a growing branch, or by removing aring of bark. The downward currents are ob-structed, like that of a stream by a dam, andnew material accumulates above the obstruc-tion, and not below, as shown in Fig. of -^^ Grafting, it is essential that some portionsa Constriction of the cut Surfaces uniting the stock and shootupon the Growth ghould be placed so accurately together that of a Sapli
. The American fruit culturist. nd to correspond exactly withthe time since the operation was performed. The descent of the elaborated sap in theinner bark may be shown by tying a ligaturearound a growing branch, or by removing aring of bark. The downward currents are ob-structed, like that of a stream by a dam, andnew material accumulates above the obstruc-tion, and not below, as shown in Fig. of -^^ Grafting, it is essential that some portionsa Constriction of the cut Surfaces uniting the stock and shootupon the Growth ghould be placed so accurately together that of a Sapling. -^ jo the sap may flow up through the alburnum orsap-wood from the stock to the shoot, and that the cambiumof the shoot may grow to that of the stock. When this uniontakes place, the rest of the cut faces, even if some distanceapart, are soon cemented by the newly-forming wood, whichfills all the vacant space. In Budding, the newly-set bud is cemented to the wood ofthe stock by the cambium, which hardens and fastens it. The. PRINCIPLES OF THE GROWTH OF TREES. ir next spring the bud grows, forms a shoot, and the two por-tions become securely united by the new wood. Unless thecambium is vigorous enough to join the wood to the stock,the operation cannot succeed; and this is the reason why, withvigorously growing stocks, in which the sap is flowing freely,which are consequently rapidly forming new wood, buddingsucceeds better than with feeble growers, where but little ofthis natural cement exists. The rapidity with which leaves exhale moisture is shownby severing them from the stem in dry weather. They soonwither and become dry. Cut a shoot from a tree, and throw-it down in the suns rays, and it will quickly shrivel, in con-sequence of the rapid escape of its moisture through theleaves. But first cut off all the leaves, and the shoot will re-main plump a long time. This is the reason that it becomesnecessary to remove the leaves at once from scions cut forbudding. Hence also th
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfruitculture, bookyea
