YIELD OF SPRING WHEAT 



17 



Table 3. — Annual and average yields of spring wheat by each of three methods when 

 the soil was wet to different depths in the spring at 15 field stations in the Great 

 Plains during the period 1907-38 — Continued 



SHERIDAN, WYO. 



Year 



Plot A 



PIotB 



Plots C and D 



lfoot 



2 feet 



3 feet 



lfoot 



2 feet 



3 feet 



lfoot 



2 feet 



3 feet 



1917 



Bushels 



Bushels 

 6.5 



Bushels 



Bushels 



Bushels 

 5.3 



Bushels 



Bushels 



Bushels 

 5.3 



Bushels 



1918 





21.1 





23.1 





29.2 



1919 -- 



0.6 















3.3 



1920 





16.2 





20.5 







23.5 



1921 



1.0 















7.0 



1922 





22.7 



24.5 



15.2 









34.2 



1923 





13.7 









24.8 



1924 





20.8 



17.2 





21.8 



18.2 







27.2 



1925 _ 















30.8 



1926 





7.3 





5.8 



21.5 







25.3 



1928 





22.5 



13.7 











42.2 



1929 







13.8 



8.8 







26.8 



1930 





4.8 











20.8 



1931 . 















2.7 







1932 





20.7 

 9.5 





23.8 

 10.0 





30.8 



1933 















19.0 



1934 





1.3 





1.2 



6.2 

 







15.0 



1935 





7.0 











13.0 



1936 















3.5 



1937 





13.5 





20.2 







19.7 



1938 





25.2 





25.7 







39.7 



















Average 



.5 



8.4 



16.8 







11.7 



17.8 



2.7 



5.3 



22.9 



Number of years 



3 



7 



11 



3 



9 



9 



1 



1 



19 



BELLE FOURCHE, S. DAK 



1908 





23.3 

















1909 



23.8 





23.3 











32.2 



1910 



2.8 







 









5.0 



1911 









----- 









 





1912 . 







 6.2 









1913 





7.9 







16.8 



1914 



4.0 



56.5 





4.8 

 57.7 

 10.8 



2.8 









15.8 



1915 













57.2 





1916 



10.6 











18.7 



1917 



4.4 











11.1 



1918 



8.5 





9.8 









35.0 



1919 .. 



















6.2 



1920 





29.2 





28.7 







29.2 



1921 



3.8 





2.0 









25.0 



1922... 



29.0 





30.0 









31.5 



1923 





4.8 

 11.8 





28.5 

 19.5 







31.0 



1924 - 















23.8 



1925 





6.2 

 23.0 





15.2 

 29.3 







24.5 



1926 















45.2 



1927 





13.8 





12.3 

 26.2 







25.5 



1928 





20.3 

 17.2 



5.2 











41.7 



1929... 









23.5 

 6.7 







29.7 



1930 







......... 



15.5 









17.7 



1931 







17.0 









.8 



1932 













18.8 





1933 



12.0 





14.5 







19.8 



1934— 



4.5 





10.7 









21.3 



1935 



2.8 





2.8 









10.5 



1936— 







7.3 



2.2 







 5.3 







1.0 

 18.7 





1937 















1938.... 







6.2 







15.3 



















Average 



10.3 



11.9 



11.9 



10.2 



12.2 



23.0 





16.0 



22.2 



Number of years 



12 



14 



5 



13 



12 



5 







6 



24 



