56 PRACTICAL CORN CULTURE 



"A More Profitable Corn Planting Method." Farmers' Bul- 

 letin 400. C. P. Hartley. 



"Distance Between Hills." Illinois Bulletin 126. Hume, 

 Center and Hegnauer. 



"Successful Corn Culture." Prof. P. G. Holden. 



"Soil Book." Frank I. Mann. 



"How to Grow 100 Bushels of Corn per Acre on Worn 

 Land." Win. C. Smith. 



"The Fertility of the Land." Isaac Phillips Roberts. 



