46 
Colorado Experiment Station 
These effects upon the composition of the plant are not chang-j 
ed by the weather conditions. In Colorado Bulletin 205, I pointed 
out a marked effect produced upon the physical properties of the 
kernels by the application of nitrogen in the form of sodic nitrate, 
namely, that it produced flinty and often shrunken kernels. This 
effect was not changed in our wet season of 1915. Further, we can¬ 
not see that the yellow-beryy question was materially affected by 
the weather conditions of 1915 compared with those of 1913. 
The attack of rust seemed to materially affect the course of the 
chemical changes that took place after the early part of August, 
1915, compared with those that took place during the ripening pe¬ 
riod of the plant in 1913. 
