USE OF WATER BY SPRING WHEAT ON GREAT PLAINS. 



21 



bushels, the yield of straw per acre in pounds, and the total yield per 

 acre in pounds. 



Table 3. — Quantity of water used by the wheat crop during the growing season, 

 yields of grain and straw, and water ratio on the continuously cropped wheat 

 plat A for the years and stations specified. 



[The column headed "Ratio " shows the number of pounds of water used by the crop per pound of total yield .] 



Station and year. 



Water usee 



I. 





Yield. 



















Ratio. 



From 

 the soil. 



Precipi- 

 tation. 



Total. 



Grain. 



Straw. 



Total. 





Inches. 



Inches. 



Inches. 



Bushels. 



Pounds. 



Pounds. 





1.55 



2.97 



4.52 



3.5 



590 



800 



1,279 



1.00 



3.11 



4.11 



1.5 



200 



290 



3,208 



4.44 



4.12 



8.56 



16.0 



1,740 



2,700 



718 



3.23 



6.19 



9.42 



18.3 



1,950 



3,050 



699 



2.00 



10.45 



12.45 



24.5 



2,250 



3,720 



758 



1.09 



4.22 



5.31 



1.7 



1,040 



1,140 



1,054 



.62 



5.09 



5.71 



2.7 



380 



540 



2,393 



' 2.89 



9.08 



11.97 



25.2 



1,860 



3,370 



804 



1.95 



7.57 



9.52 



16.8 



2,300 



3,310 



651 



2.19 



11.11 



13.30 



23.8 



1,910 



3,340 



901 



2.81 



6.57 



9.38 



19.1 



1,150 



2,300 



923 



- .97 



16.30 



15.33 



26.8 



2,110 



3,720 



933 



4.81 



6.06 



10.87 



17.4 



1,410 



2,460 



1,000 



1.32 



5.53 



6.85 



5.7 



700 



1,040 



1,491 



4.09 



6.69 



10.78 



13.3 



1,310 



2,120 



1,151 



-1.08 



12.97 



11.89 



25.8 



1,550 



3,100 



868 



3.12 



3.62 



6.74 



5.5 



610 



940 



1,623 



-1.52 



17.70 



16.18 



30.5 



2,120 



3,950 



927 



4.64 



7.86 



12.50 



19.2 



2,100 



3,250 



871 



2.12 



4.55 



6.67 



15.3 



1,230 



2,150 



702 



3.44 



5.97 



9.41 



12.7 



1,390 



2,150 



991 



4.79 



2.51 



7.30 



7.5 



700 



1,150 



1,437 



2.90 



6.60 



9.50 



4.1 



1,950 



2,200 



977 



2.93 



7.92 



10.85 



13.3 



2,700 



3,500 



702 



2.51 



10.52 



13.03 



28.3 



2,900 



4,600 



641 



3.48 



2.93 



6.41 



4.0 



660 



900 



1,612 



4.96 



5.54 



10.50 



.8 



900 



950 



2,502 



2.83 



12.94 



15.77 



35.0 



3,100 



5,200 



686 



3.33 



7.96 



11.29 



16.3 



2,020 



3,000 



852 



2.84 



8.20 



11.04 



11.3 



2,970 



3,650 



685 



4.08 



11.20 



15.28 



34.8 



3,960 



6,050 



572 



3.58 



5.52 



9.10 



8.3 



1,150 



1,650 



1,248 



2.23 



9.67 



11. 90 



13.8 



3,250 



4,080 



660 



2.04 

 1.30 



2.53 



4.67 

 3.02 



11.74 



6.71 

 4.32 



14.27 



5.2 







23.8 











 3,050 







4,480 





721 



3.23 



3.03 



6.26 



2.8 



660 



830 



1,707 



2.09 



4.31 



6.40 







1,300 



1,300 



1,114 



3.25 



5.25 



8.50 



6.2 



1,320 



1,690 



1,138 



1.40 



5.25 



6.65 



4.0 



1,180 



1,420 



1,060 



2.35 



12.26 



14.61 



56.5 



5,260 



8,650 



382 



2.66 



7.34 



10.00 



10.6 



1,360 



2,000 



1,132 



1.86 



5.17 



7.03 



4.4 



980 



1,250 



1,273 



3.43 



15.16 



18.59 



49.2 



3,450 



6,400 



657 



7.17 



6.80 



13.97 



7.5 



600 



1,050 



3,012 



2.51. 



11.11 



13.62 



27.7 



2,090 



3,750 



822 



3.45 



6.32 



9.77 



3.3 



950 



1,150 



1,923 



3.71 



3.32 



7.03 



6.8 



940 



1,350 



1,179 



3.98 



7.57 



11.55 



26.8 



1,930 



3,540 



739 



1.70 



7.34 



9.04 



2.3 



680 



820 



2,495 



-2.69 



8.38 



11.07 



15.6 



1,310 



2,250 



1,114 



3.57 



3.85 



7.42 



.5 



670 



700 



2,399 



3.26 



4.81 



8.07 



8.7 



980 



1,500 



1,218 



2.17 



6.35 



8.52 



12.0 



1,520 



2,240 



861 



2.81 



8.14 



10.95 



9.2 



970 



1, 520 



1,631 



1.86 



6.31 



8.14 



3.7 



600 



820 



2,247 



Assinniboine: 



1917 



1919 



Huntley: 



1913 



1914 



1915 



Williston: 



1910 



1911 



1912 



1913 



1914 



1915 



Dickinson: 



1909 



1910 



1911 



1913 



1915 



1917 



Mandan: 



1915 



1916 , 



1917 



1918 



1919 , 



Edgeley: 



1907 



1908 



1909 



1910 



1911 



1912 



1913 



1914 



1915....... 



1917 



Hettinger: 



1913 



1917 



1919 



Belle Fourche: 



1909 



1910 



1912 



1913 



1914 



1915 



1916 



1917 



Ardmore: 



1915 



1917 



1918 



1919 



Archer: 



1914 



1915 



1916 



1917 



Scottsbluff: 



1911 



1912 ;'. 



1913 



1917 



1918 



