. Bulletin. 1901-13. Agriculture; Agriculture. 12 EXPERIMENTS IN WHEAT BREEDING. Table III.—Data from six wheat -plants, showing irregular variation in yield and in nitrogen content of grain. Plant No. Kernels. Nitrogen in kernels. Plant No. Kernels. Nitrogen in kernels. Number. Weight. Per cpnt. Total weight. Numljer. Weight. Per cent. Total weight. 21107 21108 21109 1,058 1,030 927 Grams. 16. 679 16. 026 2. .59 Grams. .4324 .2789 23905 23907 24005 776 1,167 1,495 Grams. Gram.'i. . . The three plants, Nos. 21107 to 2
. Bulletin. 1901-13. Agriculture; Agriculture. 12 EXPERIMENTS IN WHEAT BREEDING. Table III.—Data from six wheat -plants, showing irregular variation in yield and in nitrogen content of grain. Plant No. Kernels. Nitrogen in kernels. Plant No. Kernels. Nitrogen in kernels. Number. Weight. Per cpnt. Total weight. Numljer. Weight. Per cent. Total weight. 21107 21108 21109 1,058 1,030 927 Grams. 16. 679 16. 026 2. .59 Grams. .4324 .2789 23905 23907 24005 776 1,167 1,495 Grams. Gram.'i. . . The three plants, Nos. 21107 to 21109, are from the same mother growing in a single centgener, probably less than 2 feet apart, yet the actual grams of nitrogen gathered differ more than 100 per. Fig. 2.—Centgener nursery, Agricultural Experiment Station. Kach centgener contains 100 plants. cent. This difference is not inherited, as these plants rarely trans- mit this quality. It therefore seems hard to explain on a difference in the root development or in the functioning parts of the j)lant. As phints growing only G inches apart commonly exhil)it such differ- ences, it can not be ascribed to a difference in soil solution. Differ- ence in vigor of growth is not a satisfactory explanation, as plants Nos. 23905, 23907, and 24005 illustrate. These three plants under uniform conditions yielded differtMil quantities of grain, yet the heaviest yielder produced no more nitrogen than the lowest. Such (lifftM'ences are not only common among plants from the same cent- g(*ner, but quite marked variations arc also noted between ccnt- geners from the same mother plant. 260. 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 United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
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