36 



BULLETIN 214, U. S. DEPARTMENT OF AGRICULTURE. 



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

 the Amarillo Field Station, 1908 to 1914, inclusive. 



Treatment and previous crop. 



Number 

 of plats 

 averaged. 



Yield per acre (bushels). 



1908 



1909 



<U910 



1911 



1912 



1913 



1914 



Average. 



Fall plowed: 



1 



2 

 62 



8.5 

 13.5 

 14.0 





 

 2.8 





5.7 

 6.3 

 10.0 



1.3 

 4.3 



8.5 







1.2 



1.5 



11.7 

 9.4 

 11.9 



4.5 





5.8 



Wheat 



8.1 









5 



12.5 



.7 





7.1 



4.6 



1.1 



10.8 



6.2 







Spring plowed: 



1 



1 



c\ 



8.0 

 5.3 

 16.2 





 

 





11.6 



6.8 

 9.4 



9.3 

 6.2 

 6.3 



.5 

 .2 

 



10.2 

 3.3 

 11.0 



6.6 





3.6 



Wheat 



7.2 









3 



11.4 









9.3 



7.3 



.2 



8.2 



6.1 









1 



1 

 1 



14.3 

 16.2 

 8.3 







4.0 

 





12.9 

 11.3 

 12.1 



4.7 

 4.2 

 6.3 



1.5 

 .8 

 1.0 



11.0 

 12.3 

 11.8 



7.4 





8.1 





6.6 







Green manured: 



Rye 



1 

 1 



14.2 

 19.7 



4.3 

 





7.5 

 11.4 



9.2 



8.7 



2.3 

 2.5 



11.7 

 10.7 



8.2 





8.8 









2 



17.0 



2.2 





9.5 



9.0 



2.4 



11.2 



8.6 









<*6 



16.3 



10.0 





18.7 



9.8 



8.1 



12.7 



12.6 











13.3 



2.1 





10.5 



7.2 



3.3 



11.2 



7.9 









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 

 (1 plat). 



Listed 

 (1 plat). 



Sub- 

 soiled 

 (1 plat). 



Green 

 manured 

 (2 plats). 



Sum- 

 mer 

 tilled 

 (6 plats). 



Corn 

 (3 plats). 



Small 



grain 



(8 plats). 



Yields of grain: 

 1908... bushels.. 

 1909 do.... 

 1910a ..do.. 



12.5 



.7 



11.4 

 



8.3 

 



14.3 

 



16.2 



4.0 



17.0 

 2.2 



16.3 

 10.0 



8.3 

 



13.7 

 .9 



1911 do.... 



1912 do.... 



1913 do.... 

 1914 do.... 



7.1 

 4.6 

 1.1 

 10.8 



9.3 



7.3 



.2 



8.2 



12.1 

 6.3 

 1.0 



11.8 



12.9 

 4.7 

 1.5 



11.0 



11.3 



4.2 



.8 



12.3 



9.5 

 9.0 

 2.4 

 11.2 



18.7 

 9.8 

 8.1 



12.7 



9.8 



5.6 



.5 



11.2 



9.0 

 5.5 

 1.0 

 10.0 



Average 



6.2 



6.1 



6.6 



7.4 



8.1 



8.6 



12.6 



5.9 



6.7 



Crop value, cost of 

 production, etc.: 



$4.34 

 6.56 



$4.27 

 6.09 



$4.62 

 4.75 



$5.18 

 5.55 



$5.67 



7.17 



$6.02 

 14.61 



$8.82 

 11.50 







Cost 















-2.22 



-1.82 



- .13 



- .37 



-1.50 



- 8.59 



- 2.68 













i Location of station changed in 1910; records not used. 

 b One plat only to 1912. 



c Two plats averaged to 1911. 



d Only two plats were averaged up to 1912. 



None of the methods under trial show the production of spring 

 wheat at a profit. More profitable crops are produced from a group 

 of crops not treated in this publication — the grain sorghums. It 

 appears from the evidence at hand that the spring-sown small grains 

 are not destined to occupy a place of major importance in the agri- 

 culture of this section. 



