A Study of Colorado Wheat 
123 
That small berries sifted out of normally developed crops average 
a little lower in protein than the large berries. 
That fixation proceeds in our soil rapidly enough to furnish a 
sufficient amount of nitrogen to become an important factor in our 
problems. 
That nitrification proceeds rapidly enough to more than quintuple 
in five months, the amount of this form of nitrogen in the soil at har¬ 
vest time. The actual increase was from the equivalent of 43.2 to 
that of 232.7 pounds of sodic nitrate from August to December, 191 5. 
