WHEAT. 



243 



those widely spaced; also, that "forms which ordinarily 

 produce mealy grains only do so under conditions which allow 

 of complete development and normal ripening, for the grains 

 of all wheats harvested in an immature state have flinty 

 endosperm." 



That the protein decreases with the decrease in rainfall 

 is shown in the following table : — ^ 



District. 

 1. 



2. 

 3.' 

 4. 

 5. 

 6. 

 7. 

 8. 

 9. 



Percentage 

 Protein. 



12-82 

 12-37 

 12-25 

 11-56 

 11-16 

 10-96 

 10-75 

 10-63 

 9-03 



Thus, wheats produced in arid regions have a higher per- 

 centage of protein than the same wheats grown in humid 

 parts, and although the composition of wheat varies markedly 

 in the different varieties, as a whole the above statement is 

 also true. 



Moreover, climate has an infinitely greater influence on 

 composition than difference in soil may have. In America, soil 

 was taken from a humid part, Pullman, to an arid locality, 

 Ritzville, and vice versa, with the result shown below. ^ 



Original seed grown at Pullman, 1905 ... 9-58% protein. 

 Ritzsville, 1905 12" 57 



Percentage 

 protein. 



Percentage 



protein, 



1907. 



Pullman seed on Pullman soil at Pullman 

 Pullman seed on Rit/sville soil at Pullman . 

 Ritzsville seed on Pullman soil at Pullman . 

 Ritzsville seed on Ritzsville soil at Pullman . 

 Pullman seed on Pullman soil at Ritzsville . 

 Pullman seed on Ritzsville soil at Ritzsville . 

 Ritzsville seed on Pullman soil at Ritzsville . 

 Ritzsville seed on Ritzsville soil at Ritzsville 



