A Study of Colorado Wheat 65 
CHECK SAMPLES OF 1913 REPRESENT NORMAL COLORADO WHEAT 
In my judgment we have no set or sets of samples which are more 
fairly representative of normal Colorado wheat than the check samples 
grown in 1913. We may indude with these the samples grown with the 
application of potassium and also those grown with the application of 
phosphorus, but not those grown with the application of nitric nitro¬ 
gen. My reasons for including the former, but not the latter samples, 
are that the former differ less from those grown on the check plots in 
their physical properties, than samples grown in the same district differ 
from one another, but which is not true of those grown with the ap¬ 
plication of nitrates. It is true that we find the same kind of differ¬ 
ences, and as great, in the samples of wheat grown in different sections 
of the State, as we find in our samples grown under different condi¬ 
tions, but the marked exceptions of this character, which have fallen 
under my observation, have been due to an unusual supply of nitric- 
nitrogen formed in the soil. We would obtain a better average for our 
wheats by including the samples grown with the applications of nitric- 
nitrogen, but our object is to present the facts, as nearly as we may 
see them, and not to present a good average composition for our wheat. 
In the following statement, the analysis given under each section 
is the average of wheat from three plots, a check plot, a plot with the 
addition of phosphorus and one with the addition of potassium. The 
average in each case is really the average of nine analyses. The 
varieties are given and no remarks are needed in this place. 
