. Plant propagation : greenhouse and nursery practice . Plant propagation. METHODS 01-- GRAFTING 237 In the furrow method (Fig. 180) a furrow eight inches deep is made with a turning plow, the grafts placed against the vertical side, and soil plowed back against them. The work is finished either by men tramping the earth against the grafts individually or by machine (Fig. 193} with two wheels set obliquely so as to press the soil downward and against the grafts when drawn by horses down the rows. Planting machines (Fig. 100) are similar to those used for transplanting cabbage, strawberry, swee
. Plant propagation : greenhouse and nursery practice . Plant propagation. METHODS 01-- GRAFTING 237 In the furrow method (Fig. 180) a furrow eight inches deep is made with a turning plow, the grafts placed against the vertical side, and soil plowed back against them. The work is finished either by men tramping the earth against the grafts individually or by machine (Fig. 193} with two wheels set obliquely so as to press the soil downward and against the grafts when drawn by horses down the rows. Planting machines (Fig. 100) are similar to those used for transplanting cabbage, strawberry, sweet potato and other truck crops. During the growing season the nursery rows are culti\-ated by weekly shallow stirrings of the surface soil with cultiva- tors and by hoeing out weeds among the grow- ing grafts. At the end of the first season's growth, fruit trees should be three to five feet or even taller in some cases. Trees of such heights are ready for orchard planting. Many trees, however, are allowed to grow till two or even more years old. 308. "Incubator" boxes in grafting.—Success has been greatlj' enhanced by an "incubator box," in which the grafts in bun- dles or in layers are packed with damp moss and kept at a tempera- ture of 75 to 80 for about three weeks by which time callusing is good enough to permit remo\aI. The grafts (made in the whip style) have their tap-roots shortened to six inches and are potted in six- inch pots. When a few leaves have appeared, the plants are hardened off and placed in a frame for the first year. This method has given about 75 per cent success. 309. Boot grafting vs. top grafting.—In West Virginia, King apples top-worked on seedlings were in fairly good condition at 20 years old, whereas others root grafted and set in the same orchard. FIG. 193— NEWLY PLANTED GRAFTS Center wheels pack earth beside the Please note that these images are extracted from scanned page images that may have been digi
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