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<br />I <br /> <br />DEPARTMENT OF PUBLIC WORKS <br /> <br />"I <br /> <br />215 <br /> <br />up to July 1 and t~ yield of corn in Adams and Phelps Counties, <br />since 1905. The data is arranged in descending order of yields, <br />not chronologically, and in groups of comparable yields, each group <br />being averaged. The same correlation is shown graphically in Figure 7. <br />While there are many discrepancies, the data as a whole show <br />clearly a' correlation between the yield of corn and the effective rain- <br />'fall up to July 1. There are three exoeptional years,-mimely 1907, <br />1913, and 1918, when moisture conditions up to July 1 were generally <br />favorable for good yields, but unusually poor yields were obtained. <br />In the case of the latter two the poor yields were d\le to unusually hot <br />and dry weather in July and August. <br />Table 5 also shows the effe~h'-e rainfall during July and August. <br />The.statement has been made -(5 p. 151) that it is the rainfall during <br />these two months that determines the yield of corn. While there is no <br /> <br />TABLE 5.-Correlatlon of the Yield of Corn with Effeetlve Rainfall 1n.A.dam. <br />and Phelps Countlea, Nebraska. <br /> <br />(Effective Rainfall equals Total Rains of over 0.50 inches during months of <br />Sept., Oct., Nov., Apr., May, June and "July.) . <br /> <br />'~) <br /> <br />Year <br /> <br />Adams <br />Co. <br /> <br />Yield <br />per <br />acre <br />Bu. <br />42.3 <br />42.2 <br />38.3 <br />36.0 <br />39.7 <br /> <br />35.1 <br />34.0 <br />33.0 <br />33.0 <br />33.8 <br />33.0 <br />31.7 <br />31.0 <br />29.0 <br />81~1l <br /> <br />27.0. <br />25.0 <br />24.9 <br />24.1 <br />25.3 <br /> <br />23.9 <br />22.0 <br />21.2 <br />20.7 <br />20.0 <br />17.5 <br />17.0 <br />16.6 <br />19.9 <br /> <br />Phelps <br />Co. <br /> <br />1905 <br />1906 <br /> <br />1905 <br /> <br />1915 <br /> <br />Average <br />1915. <br />1908 <br />1920' <br />1910 <br />Average <br /> <br />1919 <br /> <br />1906 <br /> <br />1923 <br /> <br />1923 <br />Average <br /> <br />1919 <br /> <br />1920 <br /> <br />, <br />I <br />, <br />i <br />j <br /> <br />1916 <br />1914 <br />Average <br /> <br />1916 <br /> <br />1917 <br />1912 <br />1911 <br />1921 <br /> <br />1908 <br />1917 <br />1911 <br /> <br />Average <br /> <br />Effective <br />Rainfall up <br />to July.1 <br />Inches <br />24.76 <br />13.29 <br />20~98 <br />19.20 <br />19.56 <br /> <br />17.45 <br />12.64 <br />19.85 . <br />13.87 <br />15.93 <br />10.87 <br />14.39 <br />14.79 <br />14.61 <br />lUT <br /> <br />11040 <br />6.16 <br />9.21 <br />10.14 <br />9.23 <br /> <br />10.18 <br />9.90 <br />11.57 <br />. 3.68 <br />8.28 <br />9.64 . <br />7.31 <br />6.40 <br />8.37 <br /> <br />Effective <br />July <br />Rainfall <br />Inches <br />. 4.86 <br />3.9r <br />2.16 <br />6.65 <br />4.40 <br /> <br />4.80 <br />4.95 <br />2.83 <br />. 1.02 <br />3.40 <br />3.60 <br />2.84 <br />o <br />1.77 <br />US <br /> <br />3.60 <br />.50 <br />.60 <br />1. 73 <br />U1 <br />2.32 <br />.50 <br />1.65 <br />5.34 <br />2.95 <br />3.36 <br />o <br />3.62 <br />2.47 <br /> <br />Ettective <br />August <br />Rainfall <br />Inches <br />1.74 . <br />4.26 <br />.74 <br />5.25 <br />2.99 <br /> <br />5.07 <br />4.78 <br />3.57 <br />5.72 <br />4.78 <br />o <br />.94 <br />1.50 <br />1.85 <br />1.07 <br /> <br />o <br />2.58 <br />1.65 <br />5.50 <br />2.43 <br /> <br />6.37 <br />.50 <br />1.60 <br />5.02 <br />1.52 <br />3.61 <br />o <br />5.35 <br />2.99 <br /> <br />Ettective <br />July <br />and Aug. <br />Rainfall <br />Inches <br />6.60 <br />8.17 <br />2.90 <br />11.90. <br />7.39 <br /> <br />9.87 <br />9.73 <br />6.40 <br />6.74 <br />8.18 <br />3.60 <br />3.78 <br />1.50 <br />3.62 <br />3.12 <br /> <br />3.60 <br />3.08 <br />2.25 <br />7.23 <br />4.04 <br /> <br />8.69 <br />1.00 <br />3.25 <br />10.36 <br />4.47 <br />. . 6.97 <br />o <br />8.97 <br />5.96 <br /> <br />- -.--, <br />