FARM CROPS. 



(4) Hard spring, (5) Hard winter, (6) Durum, 

 (7) Irrigated and (8) White wheat. 



Wheat is also often 

 classified as spring or 

 winter, depending 

 upon the time the 

 seed is sown. Spring 

 sown wheat can be 

 transformed into a 

 winter sort or winter 

 wheat into a spring 

 sown sort by slowly 

 adapting each to cli- 

 matic differences. 



Wheat Improve- 

 ment. Considerable 

 work has already 

 been done towards 

 the development of 

 wheat. This has 

 taken place through 

 three avenues of 

 work: (i) By selec- 

 tion of variation 

 found in established 

 varieties, (2) by in- 

 troduction of foreign 

 varieties, (3) by cross- 

 ing two or more va- 

 rieties and eliminat- 

 ing all but the desir- 

 able hybrids through 

 subsequent selection. 



Wheat Seeding. Wheat seeding differs but little 

 from that of oats. The use of the grain drill is more 

 common, and in general the seed bed is more carefully 

 prepared, but aside from this there is practically no 

 difference. The time of seeding will depend more 

 largely on climatic conditions, on the fertility of the 



TYPICAL HEADS OF FIVE COMMON VA- 

 RIETIES OF BREAD WHEAT. 



6, Malakoff; 7, Pesterboden; 8, Indiana Swamp; 

 9, Fulcaster; 10, Harvest King. 



