. Plant propagation : greenhouse and nursery practice . Plant propagation. LUTTUJl ULAT «9. FIG. 77—PIPE-WARMED HOTBED a, plant support,' b, hot-water pipes; c, water tanks. i,n-eenhuuse benches. (Fig. 76.) When necessary to in- tensify the heat the space beneath the bench is walled in tightly to confine the heat. In a small way bell glasses and similar utensils (Fig. 32) are placed over seeds, seedlings or cuttings on the benches or merely over a soup plate or a sau- cer filled with sand which covers the cut- tings. Sun heat alone is often used in such cases. 5. Propagating ovens (Figs. 36, 3
. Plant propagation : greenhouse and nursery practice . Plant propagation. LUTTUJl ULAT «9. FIG. 77—PIPE-WARMED HOTBED a, plant support,' b, hot-water pipes; c, water tanks. i,n-eenhuuse benches. (Fig. 76.) When necessary to in- tensify the heat the space beneath the bench is walled in tightly to confine the heat. In a small way bell glasses and similar utensils (Fig. 32) are placed over seeds, seedlings or cuttings on the benches or merely over a soup plate or a sau- cer filled with sand which covers the cut- tings. Sun heat alone is often used in such cases. 5. Propagating ovens (Figs. 36, 37) are some- times used for small lots of seeds or cut- tings, as in schools where teaching the principles of plant cul- ture rather than com- mercial work is the aim, where the room temperature falls low during the night and where there are no green- house facilities. They are generally heated by lamps and are usually more or less insulated boxes with only three to five cubic feet content. In the bottom is a chamber for a kerosene lamp reached by a door for fill- ing and other attention. Above the lamp is a galvanized iron water tray and above this a perforated floor. Next above is the sand tray in which the cuttings are placed for propaga- tion. The cover is of glass. By means of the lamp the water is made to give off vapor which keeps sand and air above it warm and moist. Regulation of the size of the ffame and of the ventilators will control both temperature and humidity in the propagating chamber. 135. Bottom and air heat effects. All growth in plants results from a stimulus of some kind. Various agents may bring it about; for instance, ether vapor. So far, however, as the commercial plant propagator is con-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kains, M. G. (Maurice Grenville), 1868-1946.
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectplantpropagation
