80 INDIAN CORN CULTURE. 



At the' Purdue University experiment station 

 Prof. Latta has found the average results of 

 cultivating corn for six years, at depths of one, 

 two, and three inches, to have been decidedly 

 in favor of shallow culture, the average yields 

 being 51.06 bu. for one inch, 50.09 for two, and 

 48.73 bu. for three inches.* By referring back 

 to the report on frequency of cultivation at the 

 Illin'ois station it will be noted that the shallow 

 gave an increase of four bushels per acre over 

 that of the deep in both ordinary and frequent 



cultivation. Figs. 22, 23 and 24 show three in- 

 teresting forms of culivators specially made for 

 shallow culture. 



The root-pruning of corn directly bears 

 upon the subject of depth of cultivation. Some 

 years ago attention was directed to this subject. 

 In 1882, at the New York experiment station, 

 root-pruning of corn was compared with that 

 not root-pruned, by Dr. E. L. Sturtevant, with 



* Bulletin 50, Vol. V, Aprilj^ 1894, Purdue l^niversity agri- 

 cultural experiment statiou, p. 48. 



