. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 12 BULLETIN 99, U. S. DEPARTMENT OF AGRICULTURE. found that short rows can be sown by hand fairly rapidly, very uni- formly, and much more accurately than by machine. In the beginning of the work only one row of each strain was grown, but it was found that the same strain should be replicated in as many rows in different parts of the field as is feasible. Beginning in 1909, the different strains were replicated several times and have been each year since then. After trying different systems it has been decided to repea
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 12 BULLETIN 99, U. S. DEPARTMENT OF AGRICULTURE. found that short rows can be sown by hand fairly rapidly, very uni- formly, and much more accurately than by machine. In the beginning of the work only one row of each strain was grown, but it was found that the same strain should be replicated in as many rows in different parts of the field as is feasible. Beginning in 1909, the different strains were replicated several times and have been each year since then. After trying different systems it has been decided to repeat each variety or strain 10 times, as any less number is considered too small. Since the average of all the rows is easily obtainable with 10 as a divisor, it makes it all the more desir-. FlG. 3.—Oat nursery at the Cornell University experiment station, 1912. able to use this number. Figure 3 shows the oat nursery at the Cornell experiment station in 1912. In regard to the use of short rows for the testing of strains, it may be said that of all the systems tried this method seems the most accurate. This is especially true on soil which is very non- uniform. It is not safe to draw conclusions from one plat of a variety, as the plat may be very favorably or unfavorably located and the results influenced thereby. On tins point attention may be called to the work of Dr. T. L. After comparing the errors obtained from rod rows and tenth-acre plats, he concludes: 1 Lyon, T. L. A comparison of the error in yields of wheat from plats and from single rows in multiple series. Proceedings, American Society of Agronomy, v. 2,1910, p. 38-39, 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. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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