Figure 40. The five bundles of timothy shown in this picture 

 were grown from the same amount of seed under identical con- 

 ditions. This is a variation in the quantity of hay that can 

 be grown from the same amount of seed. It is, therefore, valu- 

 able that good seed be planted. (Photograph furnished by Depart. 

 Plant Breeding, Cornell Univ.) 



Figure 41. Photograph to show the effect of crossing one 

 variety' of wheat with another. The large head in the middle 

 is the result of this crossing. See text for further details. (Photo- 

 graph furnished Depart. Plant Breeding, Cornell Univ.) 



