corn iisr the great plains area. 



21 



No one of the six methods other than summer tillage maintained a 

 position as either the best or poorest throughout the three years. 



The greatest profit, $9.64 per acre, was from corn on land that was 

 summer tilled the preceding year. A profit nearly as great, $9.43 

 per acre, was realized from corn by spring plowing following small 

 grain. An average profit of $8.06 per acre was realized from corn fol- 

 lowing corn by fall plowing. Subsoiling after corn, fall plowing after 

 small grain, listing after corn, and spring plowing after corn show 

 profits ranging from $7.10 to $7.88 per acre. 



NORTH PLATTE FIELD STATION. 



The results of eight years are available for study from the field sta- 

 tion at North Platte, Nebr. A study of Table XII shows that this 

 station has produced four good crops of corn. In two other years 

 the average yields were low, but good yields were produced by some 

 methods. In the remaining two years some corn was produced but 

 not enough to warrant husking. The average for eight years shows 

 that there is very little choice to be made between fall and spring 

 plowing, nor were wide differences manifested in the results by these 

 methods in any of the years comprising the series. 



Table XII. 



Yields and cost of production of corn by different methods at the North 

 Platte Field Station, 1907 to 1914, inclusive. 





Fall plowed. 



Spring plowed. 







Yields, values, etc. 

 (average per acre). 



After corn (1 

 plat). 



After small 

 grain (9 plats). 



After corn (1 

 plat). 



After small 

 grain (9 plats). 



(1 plat). 





i 



03 



o 



o 

 +^> 

 OQ 



.9 



03 



c 



CD 



t> 



o 

 m 



.a 



03 



o 



> 



o 

 w 



.a 



03 



o 



CD 



t> 



o 

 W 



.a 



03 



o 



> 



a 



Yields: 



1907 



Bush. 

 27.7 

 24.6 

 31.6 



6.2 





 39.9 





 15.5 



Lbs. 

 4,360 

 2,660 

 2,790 

 2,500 

 580 

 2,330 

 1,780 

 2,060 



Bush. 

 19.0 

 27.4 

 26.1 



2.6 





 26.1 







3.9 



Lbs. 

 4,529 

 3,143 

 2,354 

 1,200 

 755 

 2,165 

 1,540 

 1,458 



Bush. 

 28.7 

 38.6 

 29.0 



8.9 





 34.1 







8.5 



Lbs. 

 4,680 

 3,250 

 2,470 

 2,440 

 980 

 2,340 

 1,740 

 1,600 



Bush. 

 19.9 

 24.0 

 25.8 



5.8 





 26.0 







3.2 



Lbs. 

 4,609 

 3,463 

 2,613 

 1,633 

 746 

 2,734 

 1,503 

 1,156 



Bush. 

 17.9 

 38.2 

 25.0 

 21.9 





 35.1 





 27.9 



Lbs. 

 4,920 



1908 



3,530 



1909 



2,300 



1910 



3,300 



1911 



930 



1912 



2,340 



1913 



2,240 



1914 



2,130 







Average 



18.2 



2, 383 



13.3 



2,143 



18.5 



2,438 



13.2 



2,307 



20.8 



2,711 





$7.28 



$4.77 



$5.32 



$4.29 



$7.40 



$4.88 



$5.28 



$4.61 



$8.32 



$5.42 









$12. 05 

 7.49 



$9.61 

 7.49 



$12. 28 

 7.11 



$9. 

 7. 



89 

 11 



$13. 74 



Cost 



12.36 







Profit 



4-56 



2 19 



5 17 



2 



78 



1 28 





















From differences in crop sequence marked results have been 

 obtained. Corn grown continuously on the same land has averaged 

 about 5 bushels per acre more by both fall and spring plowing than 

 when grown on small-grain stubble. The average increase in yield 



