120 
Colorado Experiment Station 
in the mill, the Kubanka working very unsatisfactorily in a short re¬ 
duction. This is due to the difference in the manner of breaking into 
gritty meal. The miller may know how to eliminate this difference by 
varying his tempering process. We have offered no explanation for 
the difference in the deportment of the Red Fife and Kubanka on 
drying at lOO degrees C. for seven hours, the crushing strength of the 
one being regularly increased, and that of the other decreased rather 
than increased, for the sufficient reason that I know of no reason to 
offer. The kernels are certainly effectively dried on being heated at 
lOO! degrees C., under a pressure of not more than 75 mm. for seven 
hours. 
SUMMARY 
Our conclusions in the matter are as follows: 
That the wheat plant is much more easily influenced in the char¬ 
acter of its product, seed, by the*soil fertility than we have been taught 
to believe. 
That the individual elements of plant food exercise specific influ¬ 
ences on the composition of the grain produced. 
That nitrogen in the form of nitric-nitrogen in the soil affects the 
growth of the plant, increasing the nitrogen in both the plant and the 
seed. 
That nitric-nitrogen influences both the composition and the 
character of the grain, producing in the latter respect the characteristic 
designated as ‘‘hard” wheat, i.e., small, flinty, translucent, dark-colored 
berries, relatively rich in nitrogen. 
That these characteristics have a deeper significance in the 
plant metabolism than the production of an increase of a few tenths of 
one percent in the nitrogen content of the berry. 
That the mineral constituents contained in the berry are influenced 
by the amount of nitric-nitrogen available to the plant. 
That the mineral constituents of the plant are also influenced by 
the amount of nitric-nitrogen available tO' the plant, but to a different 
extent and not necessarily in the same direction as in the berry. 
That the nitric-nitrogen produces a soft, weak straw, causing 
lodging, both by producing a heavy growth of leaves and an elongation 
of the upper portions of the plant, and by causing a weakness in the 
lower nodes of the plant. 
That nitric-nitrogen greatly increases the susceptibility of the 
plants to the attack of the rust fungus, probably by furnishing a better 
