The
study of the chemical composition of wheat and its products in the
mill, therefore, and of the amount of fertilizing matters (nitrogen,
phosphoric acid and potash) removed from the soil by the crop, becomes
of direct interest not only to the producer from whose soil these
ingredients are removed, but to the consumer of the byproducts as
well, who desires to know what proportion of these elements of
fertility he is returning to his own soil in the different products he
may use as animal food. It is desirable also to determine what is the
average composition of wheats and the flour made from them, in order
to see in what direction efforts should be turned, by the selection of
seed wheats, to improve the present varieties for the production of
the best quality of flour. This can only be done after we determine
what variation there is for different years due to climatic influences
and variations of soil, for it has been shown in our former papers
that environment very largely influences the quality of wheat grain,
and also of the flour. When these have been determined, than we may
hope to be able to determine which factors under our control enter in
to permanently improve the better flour-producing quality of wheats.
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