13 



Composition of wheat when grown continuously in one locality and when grown in difft 



ent localities Continued. 



KTTB ANKA Continued . 

 19O8 crop from 19O7 seed. 



1OOO crop a from 19OS seed. 



Other 1900 crops not vet received and analytical data are Incomplete. These figures are submitted to 

 show the continuation of the same tendencies observed in previous years. 



VABIATIONS IN NITROGEN CONTENT. 



The great r-t \ariations shown by the tabulated data are in the 

 permit age of nitrogen, the weight per 1,000 grains and per bushel, 

 the percentage of starchy grains, and possibly the percentage of 

 sugar, though all constituents varied appreciably. As protein is the 

 most important constituent of w r heat, its variation will be discussed. 



In the case of the Crimean wheat, the percentage of protein in the 

 "i i-inal Kansas seed grown in 1905 was 16.2; in 1906 the percentage 

 of protein at Kansas was 19.1; at California, 10.4; and at Texas, 12.2, 

 a difference of over 8 per cent due entirely to the change of environ- 

 ment. In 1907 all three f>lots of wheat grown in Kansas from Kansas 

 1906 seed, California 1906 seed, and Texas 1906 seed gave the follow- 

 ing percentages of protein 22.2, 22.2, 22.8, respectively; those 

 grown in Texas, 1907, from Texas 1906 seed, Kansas 1906 seed, and 

 California 1906 seed gave 18.2 per cent, 17 per cent, and 18.2 per cent, 



[Bull, li's J 



