. Elementary principles of agriculture : a text book for the common schools. Agriculture. 30G Elementary Princi'ples of Agriculture. Fig. 195. Blooming of wheat flower. A to F opening and closing of flower; G, pistil, and K, pistil and anthers in positions at stage shown in A; //pistil at flowering stage; 7, shortly after flowering; J, portion of stigma showing germi- nating pollen grain; L, a single flower just after flowering; M, section of same.— After Hays. 440. Pollination in Grains. In wheat, oats, barley, and most other grasses, the stamens and pistil are produced in the same flower. It
. Elementary principles of agriculture : a text book for the common schools. Agriculture. 30G Elementary Princi'ples of Agriculture. Fig. 195. Blooming of wheat flower. A to F opening and closing of flower; G, pistil, and K, pistil and anthers in positions at stage shown in A; //pistil at flowering stage; 7, shortly after flowering; J, portion of stigma showing germi- nating pollen grain; L, a single flower just after flowering; M, section of same.— After Hays. 440. Pollination in Grains. In wheat, oats, barley, and most other grasses, the stamens and pistil are produced in the same flower. It has been found that the anthers shed their pollen and the stigmas become moist before the flower opens and are thus normally close fertihzed. (H 169). Prof. Hays found that wheat flowers open and close in the early morning hours, the operation consuming only 20 to 40 minutes. Study Fig. 195. In corn, the tassel produces the pollen bearing flow- ers. The silks usually appear before the pollen is shed from the tassel above. As a result corn is normally cross fertihzed by pollen blown from nearby stalks. (See U 173). 441. In Germination and in the formation of the roots, cereals show a peculiarity that is important to know when their seeds are to be planted. The first stages of germina- tion are as shown in Figs. 9 and 10. The shoot end grows up and forms a second whorl of coronal roots that are permanent, the seedling roots eventually dying. (Fig. 196). The length of the first internode varies, according to. 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 Ferguson, A. M. (Alexander McGowen), 1874-; Lewis, Lowery Laymon, 1869-. Chicago, Ill. : Ferguson Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
