72 



INDIAN CORN CULTURE. 



is to continue for a term of years. Where the 

 plowing was 10 and 12 inches deep a subsoil 

 plow followed after the common plow and 

 loosened to the necessary depth. The results 

 of this work, as given by Prof. W. C. Latta,* 

 are as follows: 



BUSHELS PER ACEE FROM DEEP AND SHALLOW PLOWING. 



Excessive drouth in 1893 accounts for the low 

 yields of that year. The deeper plowings gave 

 the best returns, with that of eight inches 

 slightly in the lead. 



According to the tenth census of the United 

 States,! on the basis of the question, "How 

 deep is the soil usually plowed for corn?" the 

 great majority of the answers from the leading 

 corn-producing States were from six to eight 

 inches, some being as low as five and a very 

 few as high as nine. In a further consider- 

 ation of this subject Prof. Brewer says::j: "In 



* Bulletin 50, Vol. V, Purdue University agricultural ex- 

 periment station, April, 1894. 



t Tenth Census of the United States. Report of the Pro- 

 ductions of Agriculture, Washington, 1883, p. 98. 



Vlhid. 



