YIELD OF SPRING WHEAT 



19 



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 



NORTH PLATTE, NEBR. 





Plot A 



PlotB 



Plots C and D 



Year 



lfoot 



2 feet 



3 feet 



lfoot 



2 feet 



3 feet 



lfoot 



2 feet 



3 feet 



1907 . 



Bushels 



Bushels 



Bushels 

 24.5 

 22.7 

 23.0 



6.8 



Bushels 



Bushels 



Bushels 

 26.0 



Bushels 



Bushels 



Bushels 

 31.8 



1908 







""q" 



27.3 

 15.3 

 6.7 







40.5 



1909 













18.0 



1910 













18.3 



1911 



















1912 





12.8 





11.2 





10.5 



1913 





2.0 

 6.0 

 22.7 





1.8 



5.2 



22.8 







10.0 



1914 















15.2 



1915 















27.8 



1916 





17.2 





17.5 







19 8 



1917 





4.2 

 3.7 





5.2 

 2.2 

 13.0 







18.7 



1918 















18.5 



1919 





15.5 

 16.5 











16.7 



1920 







18.8 

 10.2 







21.2 



1921 



6.5 

 2.3 



17.0 













17.3 



19 9 2 









3.3 







12 8 



1923 







20.2 









22.0 



1924 





14.8 





21.5 







23.0 



1925 





6.3 





4.7 

 







24.0 



1926 

















14 3 



1927 





16.2 





17.7 







21.5 



1928 



17.5 







26.3 







33 7 



1929 



12.2 

 23.0 







19.8 

 26.8 

 16.7 







26 3 



1930 















28.7 







12.7 













1932 



5.0 





3.8 









26 



1933 





9.8 





12.5 







16 7 



1934 



















3.8 





















6.0 



10.0 



16.0 



S.O 



9.6 



K 18.1 









20 7 







Number of years 



8 



8 



12 



3 



14 



11 







1 



26 



AKRON, COLO. 



1908 - 







17.3 

 14.3 

 11.3 







14.0 

 10.3 







13.7 



1909 















18.5 



1910 .. - 









6.2 







8.5 



1911 



2.9 





4.1 

 20.7 







4.7 



1912 





21.3 







16.0 



1913 



4.8 





0.8 









5 7 



1914 



22.2 





12.2 









14.2 



1915 





26.3 

 9.3 



"'""£3" 



25.8 

 3.8 

 16.2 









33.8 



1916 















12.3 



1917 





19.3 









16.2 





1921 







4.0 





2 5 





















3.9 



20.8 



14.9 



11.7 



9.2 



10.6 





16.2 



13 







Number of years 



2 



2 



7 



4 



2 



5 







1 



10 







AMARILLO, TEX 













1907 





2.5 

 17.0 







1.7 

 14.0 







2.8 

 16.0 

 10.5 





1908 















1909 









2.8 









1911 



7.3 





10.0 







19.0 



1912 





6.3 





8.5 







9.5 



1913 









1.8 





9.3 







1914 



11.0 

 12.4 

 3.5 







12.8 





13.8 



1915. . 









11.0 





11.6 





1916 









7.0 





4.7 



1917 



1.7 







3.8 







3.5 



1918 











3.2 





2.8 

















Average 



.6 



7.7 



6.3 



2.3 



8.1 



7.9 



9.3 



8.7 



10.1 







Number of years 



3 



7 



1 



2 



5 



4 



1 



5 



5 



