A Study of Colorado Wheat 
7 * 
31 
pie we have 8.054 percent protein (NX5.7) and in the latter 14:923 
percent. In the La Jara sample, with 8.288 percent protein, the ker¬ 
nels are smaller than in the Del Norte sample. There are a few berries 
which cannot be classed as either flinty or mealy, though the berry is 
uniform in appearance. This is not the case in many other samples, 
for in these the kernels show distinct areas of mealiness, sharply con¬ 
trasting with the flinty character of the rest of the kernel. This con¬ 
dition is not confined to any one variety oi either spring or winter- 
wheats. We have previously mentioned the differences in composition 
of three samples of a winter-wheat, Turkey Red, for which we gave 
the protein as 9.6, lo.o and 13.2 percent, showing a difference of 3-6 
percent in the protein present. These samples were grown, according 
to my information, from the same lot of seed and in the immediate 
i neighborhood of one another—the second and third samples within 
^ one-half mile of one another. The physical properties of these samples 
" are just as distinct as are those of the Defiance samples previously 
given. 
It seems proper to consider this subject in this connection, because 
it is tho most patent condition occurring in our general samples, cor¬ 
responding to a marked difference in composition, Kosutany, Schind¬ 
ler, and such other European writers as I have read, do not formulate 
a definite cause for this condition, though they repeatedly refer to it. 
The general explanation which runs through Schindler’s book, ‘^Der 
Weizen in seinen Beziehungen zum Klima,” is that it is dependent upon 
climate, particularly upon moisture- On page y 6 of the work just 
mentioned he says:* "‘The processes of carbohydrate formation, as well 
as the deposition in receptacles for the same, depend in the highest degree 
upon climatic factors, but the soil, the only source of nitrogen for the 
cereals, is the first of all (factors) in the (formation) of protein. The ab¬ 
solute quantity of protein in wheat depends upon this (the soil supply) and 
can be regulated by the application of nitrogen, but the relative amount 
is determined by the climate.’" This author has previously stated, page 
4T : “However fragmentary the cited material may be, one fact of funda¬ 
mental significance is shown thereby, i.e., that the absolute weight of wheat 
(weight of 1,000 kernels) stands in a definite, independent relation to the 
external conditions of growth, among which, climate excels all others in in¬ 
fluence.” These quotations suffice to show that the author: consider' 
climate as the most important factor in determining the ratio between 
the protein and carbohydrates in the wheat kernels. While this aiithor 
designates kernels as flinty, mealy, and half mealy, he does hot hicti- 
nitely state that climate causes mealine.s>s, but he says, as quoted abpye. 
- >; 
* In the quotations from Schindler T have given the title and page-iOi' tiie 
German work but not the text. The translation is the author’s. 
