22 



BULLETIN 222, U. S. DEPARTMENT OF AGRICULTURE. 



The one plat on disked-corn ground has been low in yield, its 

 average being below that of barley following small grain. There is 

 some evidence to support the belief that the location of the rotation 

 containing this plat is such that it is normally a little lower in yield 

 than the rest of the field. 



The only method under trial that exhibits power to markedly 

 increase the yield over other methods is summer tillage. This power 

 has not been manifested every year, but in some years it has been very 

 marked. The average yield for eight years by this method has been 

 26.7 bushels per acre as against 16.3 bushels where the crop followed 

 small grain. This increase in yield has been just about equal to the 

 increased cost of growing the crop under this method. All methods 

 show either a profit or a loss of less than $1 per acre. 



Table XIII. — Yields and cost of production of barley by different methods at the North 

 Platte Field Station, 1907 to 1914, inclusive. 



Treatment ami previous crop. 



Number 

 of plats 

 averaged. 









Yield 



per acre (bushels)., 







W07 



1908 



1909 



1910 



1911 



1912 



1913 



1914 



Average. 





1 



40.0 



43.3 



10.4 



12.5 







14.6 



5.0 



11.0 



17.1 







Spring plowed: 



1 

 1 



39.0 

 40.2 



19.6 

 22.3 



21.5 

 18.6 



13.8 

 16.0 





 



20.8 

 20.0 



6.5 

 6.3 



5.3 

 3.6 



15.8 





15.9 









2 



39.6 



21.0 



20.1 



14.9 





20.4 



6.4 



4.5 



15.9 







Disked: Corn 



1 



1 



30.6 

 39.0 



24.9 



67.7 



21.5 

 23.8 



7.9 

 26.0 





 



12.3 

 20.0 



5.0 

 16.5 



5.2 

 20.8 



13.4 





' 26.7 







Average of all 5 plats 





37.8 



35.6 



19.2 



15.2 





17.5 



7.9 



9.2 



17.8 









Summary of Yields and Digest of Cost. 





Tillage treatment. 



Previous crop. 



Yields, values, etc. (average per acre). 



Fall- 

 plowed 

 (1 plat). 



Spring- 

 plowed 

 (2 plats). 



Disked 

 (1 plat). 



Summer- 

 tilled 

 (1 plat). 



Small 



grain 



(3 plats). 



Corn 

 (1 plat). 



Yields of grain: 



1907 bushels. . 



1908 do.... 



1909 do.... 



1910 do.... 



1911 do.... 



1912 do.... 



1913 do.... 



1914 do.... 



40.0 

 43.3 

 10.4 

 12.5 





 14.6 



5.0 

 11.0 



39.6 

 21.0 

 20.1 

 14.9 

 

 20.4 

 6.4 

 4.5 



30.6 

 24.9 

 21.5 



7.9 





 12.3 



5.0 



5.2 



39.0 

 67.7 

 23.8 

 26.0 

 



20.0 

 16.5 

 20.8 



39.7 

 28.4 

 16.8 

 14.1 

 



18.5 

 5.9 

 6.6 



30.6 

 24.9 

 21.5 



7.9 





 12.3 



5.0 



5.2 



Average 



17.1 



15.9 



13.4 



26.7 



16.3 



13.4 







Crop value, cost of production, etc.: 



87.01 

 6.46 



$6.52 

 5.99 



$5.49 

 4.65 



$10. 95 

 11.40 





Cost 















.55 



.53 



.84 



- .55 











