22 



BULLETIN 214/ TJ. S. DEPARTMENT OF AGRICULTURE. 



and recovered by a crop. It is probable, however, that the depth 

 of feeding is not limited by any physical peculiarity of the soil and 

 that the quantity of water that can be stored is large. It is reasonable 

 therefore to expect that on this soil the maximum effect will be realized 

 from methods of tillage calculated to store water. 



Table X. — Yields and cost of production of spring wheat by different methods at the 

 Hettinger Field Station, 1912, 1913, and 1914. 



Treatment and 

 previous crop. 



Num- 

 ber of 



plats 

 aver- 

 aged. 



Yield per acre (bushels). 



Treatment and 

 previous crop. 



Num- 

 ber of 

 plats 

 aver- 

 aged. 



Yield per acre (bushels). 



1912 



1913 



»" A agf 



1912 



1913 



1914 



Aver- 

 age. 



Tall plowed: 

 Manured 

 corn 



1 

 1 



2 

 1 



9.0 

 13.8 

 17.8 

 12.0 



18.0 

 17.8 

 12.7 

 10.7 



11.7 

 12.0 

 14.1 



6.2 



12.9 

 14.5 

 14.9 

 9.6 



Disked: 



Corn 



Potatoes 



Total or 

 average . 



Green manured: 

 Rye 



11 

 1 



17.5 

 11.7 



18.4 

 16.7 



11.7 

 11.7 



15.9 

 13.4 



Oats 



Wheat 



12 



17.0 



18.3 



11.7 



15.7 



Total or 

 average. 



5 



14.1 



14.4 



11.6 



13.4 



2 



1 

 1 



16.0 

 18.3 

 11.2 



21,3 

 23.5 



8.2 



11.4 

 9.0 



7.8 



16.2 



Peas 



Sweet clover 



Total or 

 average. 



Summer tilled... 



Average of all 32 



16.9 

 9.1 



Spring plowed: 



1 

 1 

 1 



13.0 

 8.3 

 14.3 



26.3 

 16.5 

 13.8 



10.3 

 10.8 

 10.0 



16.5 

 11.9 

 12.7 



Oats 



Wheat 



4 



15.4 



18.6 



9.9 



14.6 



Total or 

 average . 



3 



11.9 



18.9 



10.4 



13.7 



8 



19.9 



29.6 



11.8 



20.4 





16.6 



20.6 



11.4 



16.2 











Summary of Yields and Digest of Cost. 





Tillage treatment. 



Previous crop. 



Yields, values, etc. (average 

 per acre). 



Fall 

 plowed 

 (5 plats). 



Spring 

 plowed 

 (3 plats). 



Disked 



(12 

 plats). 



Green 



manured 

 (4 plats). 



Summer 



tilled 

 (8 plats). 



Com 

 (14 



plats). 



Small 



grain 



(5 plats). 



Pota- 

 toes 

 (1 plat). 



Yields of grain: 



1912 bushels.. 



1913 do.... 



1914 do.... 



14.1 

 14.4 

 11.6 



11.9 

 18.9 

 10.4 



17.0 

 18.3 

 11.7 



15.4 

 18.6 

 9.9 



19.9 

 29.6 

 11.8 



16.3 

 18.6 

 11.6 



14.0 

 13.3 

 11.0 



11.7 

 16.7 

 11.7 





13.4 



13.7 



15.7 



14.6 



20.4 



15.5 



12.8 



13.4 







Crop value, cost of produc- 

 tion, etc.: 



$9.38 

 6.56 



$9.59 

 6.09 



$10. 99 

 4.75 



$10. 22 

 14.61 



$14. 28 

 11.50 









Cost 



















2.82 



3.50 



6.24 



-4.39 



2.78 

















The results of three years at this station are available for study. 

 The most striking things shown by the arrangement of yields for the 

 present study are the increased production of wheat on summer 

 tillage, on rye and peas as green manure, and on corn ground either 

 disked or plowed in the spring. When yields are studied in connec- 

 tion with cost of production, it is seen that, owing to good yield and 

 cheap cost of preparation, the greatest profit, $6.24 per acre, has 

 been obtained from wheat on disked ground. Of the disked plats, 



