CULTIVATION AND GROWTH 



35 



ger of too early seeding in that the growth becomes 

 so rank that it lessens the powers of resistance, 

 and, in many cases, exposes the wheat to the 

 ravages of the Hessian fly. Inasmuch as the 

 proper growth is the thing desired, it is readily 

 seen that the factors which promote growth also 

 make late seeding possible. Hence later sowing 



Courtesy International Harvester Co. 

 FIG. 21. A large size modern drill. 



can be more profitably practiced in fertile soils 

 than in soils less fertile ; in carefully prepared 

 ground than where poor seed bed is provided ; 

 and where moisture is ample than where it is 

 somewhat scarce. For the wheat belt in the 

 neighborhood of latitude 40 north and from alti- 

 tudes of 500 to 1000 feet, the most favorable 

 time for sowing is from September 10 to 20. 



