44 
Colorado Experiment Station 
ASH CONSTITUENTS OP YELLOW-BERRY AND FLINTY WHEAT 
Variety, Kubanka.... 
Flinty 
Flinty 
Fertilizer, per acre... 
.150 lbs. Potassium 
100 lbs. Potassium 
120 lbs. Nitrogen 
Percent 
Percent 
Percent 
Silica, SiO., . 
.0.008 
0.022 
0.012 
Iron, Fe . 
.0.003 
,0.004 
0.004 
Manganese, Mn. 
.0.003 
0.004 
0.005 
Calcium, Ca. 
.0.032 
0.032 
0.032 
Magnesium, Mg. 
.0.140 
0.140 
0.133 
Potassium, K . 
. ..0.444 
0.408 
0.418 
Sodium, Na . 
.0.041 
0.022 
0.016 
Chlorin, Cl . 
.0.123 
0.118 
0.093 
Sulfur, S. 
.0.093 
0.103 
0.128 
Phosphorus, P (total). 
.0.394 
0.394 
0.343 
Inorganic, P . 
.. .0.011 
0.011 
0.008 
Organic, P . 
.0.383 
0.383 
0.335 
Nitrogen, N . 
.1.629 
2.057 
2.168 
Specific Gravity . 
.1.3976 
1.4363 
1.4241 
The above results are given in percentages of the air-dried grain. 
THE RATIO OF PROTEIN TO STARCH 
As the protein and starch make up about 75 percent of the air- 
driedi wheat, they must bear an inverse relation to one another, i.e., 
if the percentage of protein is higher it must be largely at the expense 
of the percentage/ of the starch. We find that this is, in a measure, 
true of our results, but it is not so great or regular as we would expect. 
We see that the total nitrogen is higher in the flinty berries; and this 
fact persists throughout the analyses for all the forms of nitrogenous 
substances determined. It is rather surprising that this is shown in 
the case of the Red Fife samples, for, as the footnote states, the dis¬ 
tinction between flinty and starchy kernels in this case was difficult to 
make. The Kubanka was more easily sorted into two distinct classes. 
In the case of the check samples, we find that there is a difference of 
roughly, 0.32 percent of nitrogen in favor of the flinty berries; in the 
case of the samples grown with phosphorus 0.26 percent; and in the 
case of the samples grown with the application of potassium, 0.45 per¬ 
cent. We find for the true gluten a difference of 1.4 percent in favor 
of the flinty kernels in the case of phosphorus fertilization; 2.0 per¬ 
cent with potassium, and 2.0 percent in the case of the check plots. 
This is not the place to consider the character of the gluten, but it may 
be stated in a tentative and general way that this feature of the wheat 
is in favor of the starchy kernels. The glutenin-nitrogen is regularly 
higher in the flinty kernels. 
The total ash is not given in the table, only the mineral, or ash- 
constituents in the air-dried grain. There are some differences sug¬ 
gested by the results given; the principal one is that the starchy wheats 
are higher in potassium than the flinty ones. 
