14 



BULLETIN 222, U. S. DEPARTMENT OF AGRICULTURE. 



barley was plowed under instead of rye, with the result that there 

 was a sharp decrease in yield. 



A profit was realized from all the methods under triai. The largest 

 profit, $9.50 per acre, was on disked corn ground. Spring plowing 

 shows a profit of $6.15 per acre, while the average profit from green 

 manure was $3.45. 



Table VI. — Yields and cost of production of barley by different methods at the Huntley 

 Field Station, 1913 and 1914- 



Treatment and previous crop. 



Number 

 of plats 

 averaged. 



Yield per acre (bushels). 



1913 



1914 



Average. 





1 

 4 



24.5 

 23.2 



34.6 



45.7 



29.6 





34.5 







Green manured: 



1 

 1 



19.6 

 36.3 



55.6 

 63.6 



37.6 





50.0 









2 



28.0 



59.6 



43.8 











24.7 



48.1 



36.4 









Summary of Yields and Digest of Cost. 





Tillage treatment. 



Previous crop. 



Values, etc. 



(average per 



acre). 



Tillage treatment. 



Yields (average per acre). 



Spring 

 plowed 

 (1 plat). 



Disked 

 (4 



plats). 



Green 



ma- 



ured(2 



plats). 



Small 



grain 



(1 



plat). 



Corn 



S 4 



plats). 



Spring 

 plowed. 

 (1 plat). 



Disked 



(4 

 plats). 



Green 

 ma- 

 nured 

 (2 plats) 



Yields of grain: 



1913 bushels.. 



1914 do.... 



24.5 

 34.6 



23.2 



45.7 



28.0 

 59.6 



24.5 

 34.6 



23.2 



45.7 



Crop value, 

 cost, etc.: 

 Value... 



Cost 



Profit. 



$12. 14 

 5.99 



$14. 15 

 4.65 



$17. 96 

 14.51 





29.6 



34.5 



43.8 



29.6 



34.5 





6.15 



9.50 



3.45 



WILLISTON FIELD STATION. 



The results of five years are available from Williston, N. Dak. In 

 two of these years the yields were heavy, one year they were fair, and 

 two years they were very poor. 



Between the fall and spring plowing of barley stubble, there is 

 little difference to be noted, except in 1912, when fall plowing was 

 much the better. Between barley and oat stubble plowed in the 

 spring, the only year that showed a significant difference was 1914, 

 when the advantage was with the oat stubble. The crop on sum- 

 mer tillage was every year better than that following either oats 

 or barley. For three years summer tillage yielded heavier than 

 disked corn ground and for two years the reverse was the case. The 

 high yield together with low cost combined to make disked corn 

 ground show the greatest profit, $6.63 per acre. The higher cost of 

 summer tillage reduced the profit from it to 41 cents per acre. Both 

 fall and spring plowing show small profits. 



