CORN, WHEAT, OATS, BARLEY, RYE 



49 



States. As in the case of climatic factors corn has become 

 adapted to a wide range of soils, varying in texture from very 

 heavy clays to light sands, and in fertility from soils rich in 

 both organic matter and mineral nutrients to very poor soils. 

 Much can be done in improving poor soil conditions by proper 



jettan in dty-t- Bui- Vy U. 



Fig. 20. — Regions of corn production according to types growoi (after Montgomery), 



crop rotations, application of fertilizers and manures and proper 

 drainage, as mil be explained later. 



Varieties to grow. — In corn as in all other cereals there is 

 a very large number of varieties Avhich cause confusion. Many 

 varieties are known under different names, while the same name 

 is often applied to different varieties. This confusion makes it 

 very uncertain in selecting varieties to grow. The best that 

 can be done at present to aid in the choice of varieties is to 

 give a few well established varieties that have proven satisfac- 

 tory in the different regions. Many local conditions, such as 

 elevation and locally developed varieties, etc., enter into par- 

 ticular cases. The follomng varieties are given for the regions 

 as suggested by the accompanying chart. 



