28 



BULLETIN 222, IT. S. DEPARTMENT OP AGRICULTURE. 



The only method that has consistently shown increases sufficient to 

 attract attention is summer tillage. Under this method barley has 

 given an average yield for six years of 12.6 bushels per acre, with a 

 maximum yield in any one year of 19.6 bushels per acre. On the 

 whole, barley does not seem to offer more promise for this section 

 than any other of the spring-sown small grains. 



A loss by all methods under trial has attended the growth of the 

 crop. These losses range from $1.94 on disked corn ground to $6.23 

 on summer-tilled land. 



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

 Amarillo 1 Field Station for 1908, 1909, and 1911 to 1914, inclusive. 





Number 

 of plats 

 averaged. 





Yield per 



acre (bushels). 







Treatment and previous crop. 



1909 



1910 



1911 



1912 



1913 



1914 



Average. 





1 



13.2 



5.8 



11.7 



1.7 







16.7 



8.2 







Spring plowed: 



1 

 1 



7.9 

 8.1 











12.2 

 12.3 



2.7 

 1.1 





 



21.0 



2.7 



7.3 



Oats 



4.0 









2 



8.0 







12.3 



1.9 







11.9 



5.7 









1 

 1 

 1 

 1 



10.8 



11.9 



7.5 



15.2 









 

 17.5 



11.4 

 10.3 

 11.8 

 15.0 



1.5 

 1.5 

 1.7 

 4.2 





 

 



4.2 



13.1 

 17.1 

 18.8 

 19.6 



6.1 





6.8 





6.6 





12.6 







Average of all 7 plats 





10.7 



3.3 



12.1 



2.1 



.6 



15.6 



7.4 









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). 



Listed 



(1 

 plat). 



Sub- 

 soiled 



(1 

 plat). 



Sum- 

 mer- 

 tilled 



(1 

 plat). 



Small 

 grain 



(5 

 plats). 



Corn 



(1 

 plat). 



Yields of grain: 



1908 bushels. . 



1909 do.... 



1911 do.... 



1912 do.... 



1913 do.... 



1914 do.... 



13.2 

 5.8 



11.7 

 1.7 

 



16.7 



8.0 





 12.3 



1.9 





 11.9 



7.5 





 11.8 



1.7 





 18.8 



10.8 





 11.4 



1.5 





 13.1 



11.9 





 10.3 



1.5 





 17.1 



15.2 

 17.5 

 15.0 

 4.2 

 4.2 

 19.6 



10.4 

 1.2 



11.6 

 1.7 

 



14.1 



7.5 





 11.8 



1.7 





 18.8 



Average 



8.2 



5.7 



6.6 



6.1 



6.8 



12.6 



6.5 



6.6 







Crop value, cost of production, etc.. 

 Value '. 



S3. 36 

 6.46 



$2.34 

 5.99 



S2.71 

 4.65 



82.50 

 5.45 



S2.79 

 7.07 



85.17 

 11. 40 





Cost 













Loss 



-3.10 



-3.65 



-1.94 



-2.95 



-4.28 



-6.23 











1 The location of the station was changed in 1910, and the records for that year were not used. 



GENERAL DISCUSSION OF RESULTS. 



In the preceding pages the data have been presented and discussed 

 for each station separately. In the following pages some of the more 

 important phases are discussed from a more general standpoint. 



