A Study of Colorado Wheat 
27 
not more than 7.5 percent of moisture, which is the average found 
for 1913. 
The series of samples taken in 1915 is much larger than that 
taken in 1913, but the samples representing the same period of de¬ 
velopment yield quite closely agreeing results, which indicates that 
the influence of the weather upon this factor was much less than one 
would expect and further, that these conditions in no way eliminated 
or greatly modify the influence of the individual fertilizers. 
Apropos of the influence of the date upon the development of 
the plant it may be added that the individual fertilizers are not 
wholly without effect upon this. It was a noticeable feature of the 
flelds at one period in 1914 and again in 1915 that the wheat on the 
plots to which potassium had been applied was taller and appeared 
to be more advanced than that in the other plots, but this difference 
was entirely obliterated in a few days and afterwards no difference 
between these and the other plots could be observed. 
THE EFFECT OF FERTILIZERS UPON THE NITROGEN CONTENT 
OF THE PLANTS 
We do not wish to change any of the statements made in Part 
I (Bulletin 208), p. 35, in regard to the reasons for presenting this 
subject, the scope of the work, or the variety chosen. All that we 
then said applies to our work still. 
We will add, however, the subject of the nitric nitrogen in the 
plant. This subject was passed over in Part I (Bulletin 208) because 
we wished to repeat our observations and extend our analytical 
work, which we have been able to do during the present season, and 
the results will be given in their proper place. 
