. Bulletin. 1901-13. Agriculture; Agriculture. EXPERIMENTAL ERROR AND VARIATION IN YIELD. 51 bushels. Some of these plats and the check plats noted belov are shown m figure 13. It is mterestmg to note that the check plats of original unselected Turkey winter wheat averaged bushels per acre, or about halfway between the highest and lowest pure strains. More strains surpass the check in yield than fall below it, but this is probably because a large percentage of the poor-yielding strains w^ere discarded after the first field test in 1907. It appears that neither the original selection of t
. Bulletin. 1901-13. Agriculture; Agriculture. EXPERIMENTAL ERROR AND VARIATION IN YIELD. 51 bushels. Some of these plats and the check plats noted belov are shown m figure 13. It is mterestmg to note that the check plats of original unselected Turkey winter wheat averaged bushels per acre, or about halfway between the highest and lowest pure strains. More strains surpass the check in yield than fall below it, but this is probably because a large percentage of the poor-yielding strains w^ere discarded after the first field test in 1907. It appears that neither the original selection of the 800 heads, nor the discarding of centgeners in the nursery, nor the continuous selection of high-yielding plants within the centgeners had any effect on eliminating the poor yielders. There was a marked difference in the appearance of the pure strains^ some. Fig. lo.—Field plats, showing; variations in winterkilling between two pure strains of Turkey wheat. Strain No. 377 is shown at the right and No. 102 at the left; No. 377 wit hstood the winter almost perfectly. havmg short grains and others long grains. They also varied hi color, lodging, and general appearance in the field, both in fall growth and spring growth. Figures 14, 15, 16, and 17 illustrate these variations better than they can be described. Table XX also shows the data from Table XV grouped m series of 5, and arranged m various ways to illustrate relationships. The principal considerations m this work were the improvement of wheat m nitrogen and yield. Records were kept of many characters of the plant in the nursery, but evidence points to six that are of interest, namely, (1) nitrogen content, (2) yield per plant, (3) yield per cent- gener, (4) weight of kernel, (5) strength of straw, and (6) length of fruiting period. 269. 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 perf
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