18 



CIRCULAR 5 6 3, U. S. DEPARTMENT OF AGRICULTURE 



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 



AEDMOEE, S. DAK. 



Year 



Plot A 



PlotB 



Plots C and D 



lfoot 



2 feet 



3 feet 



lfoot 



2 feet 



3 feet 



lfoot 



2 feet 



3 feet 



1912 



Bushels 

 3.3 

 2.3 



Bushels 



Bushels 



Bushels 

 3.2 

 



Bushels 



Bushels 



Bushels 

 6.5 



Bushels 



Bushels 



1913 













7 "> 



1915 





49.2 



18.0 



7.5 



49.5 









45 



1916 







17.5 







15 8 



1917 







5.5 









8 7 



1918 .- 





27.7 

 3.3 



24.2 



3.0 









37.0 



1919 















10 3 



1920 - . 





23.8 





20.0 







23.7 



1925 



7.3 





11.7 



5.3 









16.3 



1926 



5.7 



~3§.T 









11.8 





1927 







32.8 





37.2 



1928 - 





9.5 



10.7 

 2.8 

 3.2 









32.2 



1929 



5.7 











17.8 



1930 





3.8 











10.7 



1931 





1.0 





2.2 







2.5 



1932 



8.5 





5.3 









13.3 



















Average 



5.4 



9.4 



22.6 



5.3 



25.6 



18.1 



6.5 



11.8 



19.8 



Number of years 



5 



5 



6 



9 



3 



4 



1 1 



14 



SCOTTS BLUFF, NEBR. 



1911 



0.5 







0.5 







0.5 







1912 



8.7 





6.3 







22.5 



1913 





12.0 





7.8 

 6.7 







17 3 



1314 



5.7 

 5.0 













11.7 



1915 







16.2 









12.5 



1916 





5.5 





5.7 







11.2 



1917 





9.2 



3.7 





7.0 

 6.7 







18 7 



1918 















21.3 



1920 





12.3 





14.0 







19.3 



















Average 



3.7 



7.2 



9.9 



8.4 



6.7 



8.6 



.5 





16.8 



Number of years 



3 



3 



3 



2 



3 



4 



1 8 



ARCHER, WYO. 



1913 





10.3 

 6.8 







10.0 

 7.5 











1914 --- .- - 













10.1 





1915 





26.8 

 2.3 





23.7 





25.7 



1916 









2.4 



13.6 



2.5 







2.8 



1917 





15.6 

 3.5 









14.9 



1919 















7.1 























9.1 



14.6 





7.2 



23.7 





10.1 



12.6 











Number of years 







4 



2 







5 



1 







1 



4 



