16 



BULLETIN 214, U. S. DEPARTMENT OF AGRICULTURE. 



yields, while in 1910 and 1911 nearly all yields were so low as to be 

 practical failures. With this wide diversity in seasons and yields, 

 the results from year to year have been fairly consistent, the most 

 serious departure being the low yield on disked corn ground in 1914. 

 Minor differences, it is true, have been manifested, particularly as to 

 the relative merits of fall and spring plowing, but on the whole there 

 is a remarkable uniformity. 



Table VII. 



Yields and cost of -production of spring wheat by different methods at the 

 Williston Field Station, 1910 to 1914, inclusive. 



Treatment and previous crop. 



Number 

 of plats 

 averaged. 



Yield per acre (bushels). 



1910 



1911 



1912 



1913 



1914 



Average. 



Fall plowed: 



1 



2 

 1 



0.7 



.9 



1.3 



1.8 

 1.7 

 2.3 



36.5 

 35.1 

 33.8 



16.1 

 9.5 

 11.7 



23.3 

 31.0 

 22.5 



15.7 





15.6 



Wheat 



14.3 









4 



.9 



1.9 



35.1 



11.7 



26.9 



15.3 







Spring plowed* 



1 

 1 

 1 



.7 

 1.8 

 1.7 



5.5 

 4.0 

 2.7 



38.2 

 32.2 

 25.2 



14.4 

 13.0 

 16.8 



26.8 

 31.5 

 23.8 



17.1 



Oats 



16.5 



Wheat 



14.0 









3 



1.4 



4.1 



31.9 



14.7 



27.4 



15.9 









7 



.9 



5.8 



39.7 



15.3 



19.5 



16.2 







Green manured: 



Rye 



1 

 1 



2.8 

 2.0 



.8 

 2.5 



36.0 

 33.0 



18.8 



19.7 



37.3 



32.7 



19.1 





18.0 









2 



2.4 



1.7 



34.5 



19.3 



35.0 



18.6 









3 



4.9 



8.2 



39.9 



17.8 



30.3 



20.2 











1.8 



4.6 



37.0 



15.2 



25.7 



16.9 









Summary of Yields and Digest of Cost. 





Tillage treatment. 



Previous crop. 



Yields, values, etc. (average 

 per acre). 



Fall 



plowed 

 (4 plats). 



Spring 

 plowed 



(3 plats). 



Disked 

 (7 plats). 



Green 

 manured 



(2 plats). 



Summer 



tilled 

 (3 plats). 



Corn 



(9 plats). 



Small 



grain 



(5 plats). 



Yields of grain: 



1910 bushels.. 



1911 do.... 



1912 do.... 



1913 do.... 



1914 do.... 



0.9 



1.9 



35.1 



11.7 



26.9 



1.4 



4.1 



31.9 



14.7 

 27.4 



0.9 

 5.8 

 39.7 

 15.3 

 19.5 



2.4 



1.7 



34.5 



19.3 



35.0 



4.9 



8.2 



39.9 



17.8 



30.3 



0.9 



5.3 



39.2 



15.3 



20.8 



1.3 



2.5 



32.3 



12.1 



27.9 





15.3 



15.9 



16.2 



18.6 



20.2 



16.3 



15.2 







Crop value, cost of production,, 

 etc.: 



S10. 71 

 6.56 



$11.13 

 6.09 



811.34 



4.75 



$13. 02 

 14.61 



$14.14 

 11.50 







Cost 















4.15 



5.04 



6.59 



- 1.59 



2.64 













The highest average yield, 20.2 bushels per acre, has been obtained 

 from summer tillage. The plowing under of rye or peas for green 

 manure has resulted in the next highest average yield. Spring rye 



