26 



BULLETIN" 214, U. S. DEPARTMENT OF AGEICULTURE. 



Table XII. — Yields and cost of production of spring vjheat by different methods at the 

 Scottsbluff Field Station, 1912, 1913, and 1914. 



Treatment and 

 previous crop. 



Num- 

 ber of 

 plat's 

 aver- 

 aged. 



Yield per acre (bushels). 



Treatment and 

 previous crop. 



Num- 

 ber of 

 plats 

 aver- 

 aged. 



Yield per acre (bushels). 



1912 



1913 



1914 



Aver- 

 age. 



1912 



1913 



1914 



Aver- 

 age. 



Fall plowed: 



Corn 



Manured 



corn 



Oats 



Wheat 



1 

 1 

 1 



11.6 



20.8 



7.7 

 6.3 



8.0 



9.8 

 9.0 



7.S 



9.5 



9.5 

 10.3 



6.7 



9.7 



13.4 

 9.0 

 6.9 



Listed: 



Wheat 



Subsoiled: 



Wheat 



Disked: „ 



Corn 



Green manured: 

 Eye 



1 



1 



11 



15.0 

 12.3 

 19.1 



7.2 



6.3 



11.8 



6.0 



9.5 



11.1 



9.4 

 9.4 

 14.0 



Total or 



average . 



5 



10.8 



8.7 



9.3 



9.6 



1 

 1 



15.0 

 11.7 



13.0 

 14.2 



13.6 

 12.0 



13.0 



Peas 



Total or 



average . 



Summer tilled. . 

 Average of all 27 



12.6 



Spring plowed: 



Corn 



Oats 



Sorghum 



Wheat 



1 

 1 

 1 

 1 



17.3 

 11.7 

 18.7 



8.7 



11.3 

 9.5 

 11.2 

 12.0 



11.0 

 12.0 



9.0 

 5.7 



13.2 

 11.1 



13.0 



8.8 



2 



13.4 



13.6 



12.8 



13.3 



3 



27.8 



18.1 



13.8 



19.9 



Total or 

 average . 



4 



14.1 



11.0 



9.4 



11.5 



27 



17.0 



11.6 



10.7 



13.1 















* 





Summary of 



Yields 



and Digest of Cost. 











Tillage treatment. 



Previous crop. 



Yields, values, 



etc. (average per 



acre). 



Fall 

 plowed 

 (5 plats). 



Spring 

 plowed 

 (4 plats). 



Disked 



(11 

 plats). 



Listed 

 (1 plat). 



Sub- . 



soiled 



(1 plat). 



Green 

 manured 

 (2 plats). 



Sum- 

 mer 

 tilled 

 (3 plats). 



Corn 

 (14 



plats). 



Small 



grain 



(7 plats). 



Sor- 

 ghum 

 (lplat). 



Yields of grain: 

 1912.. bush... 

 1913... do.... 

 1914. ..do.. .. 



10.8 

 8.7 

 9.3 



14.1 

 11.0 



9.4 



19.1 

 11.8 

 11.1 



15.0 

 7.2 

 6.0 



12.3 

 6.3 

 9.5 



13.4 

 13.6 



12.8 



27.8 

 1S.1 

 13. S 



18.6 

 11.4 

 10.9 



9.9 

 8.3 

 8.6 



18.7 

 11.2 

 9.0 



Average 



9.6 



11.5 



14.0 



9.4 



9.4 



13.3 



19.9 



13.6 



8.9 



13.0 



Crop value, cost 

 of production, 

 etc.: 



$6.72 

 6.56 



§8.05 

 6.09 



S9.80 

 4.75 



S6.58 

 5.55 



86.58 

 7.17 



89.31 



14.61 



813. 93 

 11.50 









Cost 



















.16 



1.96 



5.05 



1.03 



- .59 



- 5.30 



2.43 



[ 







1 





Having next to the highest yield and the lowest cost of preparation, 

 disked corn ground shows the greatest profit, $5.05 per acre. Other 

 methods that show profits are spring plowing, summer tillage, listing, 

 and fall plowing. Subsoiling and green manure show losses. 



NORTH PLATTE FIELD STATION. 



The work here presented was conducted on the table-land of the 

 North Platte, Nebr., station. The soil is of the type generally known 

 as loess. With the exception of the humus accumulated near the 

 surface it is practically uniform to great depths. The storage and use 

 of water is not limited by the depth of soil or any peculiarities in it. 

 The development of roots is limited only by the physiological character 

 of the crops grown and the available moisture. It is a soil on which 

 maximum results from tillage methods would be expected. 



