. Bulletin. 1901-13. Agriculture; Agriculture. EXPERIMENTAL ERROR AND VARIATION IN YIELD. 55 per acre, it still is above the average in nitrogen content, has a strong straw and a large berry of good appearance. It is also very winter resistant, as was shown in the severe winter of 1909-10, when it came through witli much less winterkilling than standard varieties, such as Big Frame and ordinary Turkey wheat. COMPARISON OF ROWS, CENTGENERS, BLOCKS, AND FIELD PLATS. In 1909-10 the 26 strains of Turkey wheat were sown in field plats and duplicated in rows, centgeners, and blocks, but this j)ortio
. Bulletin. 1901-13. Agriculture; Agriculture. EXPERIMENTAL ERROR AND VARIATION IN YIELD. 55 per acre, it still is above the average in nitrogen content, has a strong straw and a large berry of good appearance. It is also very winter resistant, as was shown in the severe winter of 1909-10, when it came through witli much less winterkilling than standard varieties, such as Big Frame and ordinary Turkey wheat. COMPARISON OF ROWS, CENTGENERS, BLOCKS, AND FIELD PLATS. In 1909-10 the 26 strains of Turkey wheat were sown in field plats and duplicated in rows, centgeners, and blocks, but this j)ortion of the nursery was winterkilled. However, very good results were obtained with 11 varieties of oats sown in the spring of 1910 in all four ways. The field plats were one-fifteenth of an acre in size and. Fig. 19.—Block nursery, showing blocks by 16 feet in size. The beis are slightly elevated, as in the row nursery. were repeated three times. Each variety was repeated 10 times in centgeners, rows, and blocks. The centgeners were each 5 feet square and contained 100 plants 6 inches apart each way. The rows were 12 feet in length and the grain sown in them at the rate of 10 pecks per acre, the usual rate of seeding in this region. The blocks were each by 16 feet, or 5 drill rows wide (fig. 19), and sown at the usual rate of seeding. The results summarized in Table XXI show a high degree of correlation between the yield of the field plats and the rows and blocks, but practically no correlation in the case of cent- geners. Except for the Lincoln oat, which yielded exceptionally high in the nursery, the correlation in the rows and blocks would be very high. 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 perfectly resemble the original United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt
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