. Plant propagation : greenhouse and nursery practice . Plant propagation. 42 PLANT PKOrAGATION If only 10,000,000 seeds are sown to the acre. Sample 1 wouM provide over 20 weed seeds to the square 3'ard, while Sample No. 3 would distribute 240. But notice also the number of good seeds ob- tained for a cent and figure out how much is being paid for inferior and weed seeds in each case; then judge the help that pure seed will be in preventing weed growth on the farm. The Canadian Department of Agriculture found that "red clover" seed sold in Ontario contained 6,000 to 15,000 weed seed
. Plant propagation : greenhouse and nursery practice . Plant propagation. 42 PLANT PKOrAGATION If only 10,000,000 seeds are sown to the acre. Sample 1 wouM provide over 20 weed seeds to the square 3'ard, while Sample No. 3 would distribute 240. But notice also the number of good seeds ob- tained for a cent and figure out how much is being paid for inferior and weed seeds in each case; then judge the help that pure seed will be in preventing weed growth on the farm. The Canadian Department of Agriculture found that "red clover" seed sold in Ontario contained 6,000 to 15,000 weed seeds to the pound and in alsike as high as 23,550 to 49,830. An American .sample of alfalfa gave per cent or about 32,500 seeds in a pound of weed seeds, including of dodder (see C, 72), one of the worst of weeds, because, being parasitic, it kills all the alfalfa it reaches. In certain parts of the United States, it is stated, clover seed tailings are some- times used on the farm, the clean seed being sold. Such tailings have been found to contain over 273,000 weed seeds to the pound. Such seed will soon make any farm a weed paradise. 72. Losses due to low- grade seeds are evident frf)m the examples cited. may be grouped under the following : A. Direct loss on the purchase. B. Loss of crop due to in- sufficient good seed sown to the acre, with possible total loss in worst cases. C. Loss due to direct destruction of crop because of intro- duced parasites such as dodder and broom rape. FIG. 33-RHizoMEs Y) Neccssary cost of ex- 1. Iris showing old rhizome at 4eft and + i • .u j new at right. 2. Rhubarb rhizome. ^ra Cleaning tnC SCeQ. 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. New York : Orange Judd Company
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectplantpropagation
