. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CEREALS ON THE BELLE FOURCHE EXPERIMENT FARM. 7 In figure 3 are shown graphically the " useful " seasonal precipita- tion and the yields of Kubanka durum spring wheat (C. I. No. 1516) during the 12 years from 1908 to 1919, inclusive. The " useful" precipitation shown is the total precipitation in rains of inch or more during the period between the emergence and ripening of the Kubanka wheat each year. When the rains occurred during a period of two, three, or four consecutive days the total amoun
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. CEREALS ON THE BELLE FOURCHE EXPERIMENT FARM. 7 In figure 3 are shown graphically the " useful " seasonal precipita- tion and the yields of Kubanka durum spring wheat (C. I. No. 1516) during the 12 years from 1908 to 1919, inclusive. The " useful" precipitation shown is the total precipitation in rains of inch or more during the period between the emergence and ripening of the Kubanka wheat each year. When the rains occurred during a period of two, three, or four consecutive days the total amounts for the /a '06 V9 70 '// 72 73 7^ VS 76 77 78 73 .- — ••' UtS£FC/L 15E/9>^ON/4l /^/^£C/P/T/9T/0A/ r/£:LD PS/? ^CRE ('/3iy^H£:L<3). BU. 60 Fig. 3.—Diagram showing the relation between the annual useful seasonal precipitation and tlie yields per acre of Kubanka durum spring wheat on dry land at the Belle Fourche Experiment Farm for the 12-year period from 1908 to 1919, inclusive. The broken line shows the useful precipitation and the solid line the yields of Kubanka wheat. period were included even though less than inch fell on some of these days. The Kubanka variety of wheat was selected be- cause it was the leading variety, was grown each year, and was not seriously affected by rust. In figure 3 it will be seen that the yields of Kubanka wheat are closely associated with the useful seasonal precipitation during most of the years. In 1909 and 1914 the wheat was on poorer soil than usual. In 1912 most of the rains came just before the wheat M^as ripe and too late to be of benefit. The crop was a complete failure in. 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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