Repository: UIHistories Project: Booklet - Addresses from Inauguration of Noyes [PAGE 9]

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8

protein, fat, carbohydrates, fiber and ash have been placed at the command of every one engaged in this branch of agriculture. But this is not all. Just as the total

amount of plant food in the soil is I it completely available for the production of vegetable matter, so the proximate principles just mentioned do not entirely serv as nourishment for the animal body. The digestibility of the various ingredients varies in different plants as well as in different parts of the same plant. Hence a simple analysis of a feeding stuff does not always determine its true food value. For this reason additional investigations were found to be necessary. Just as in the determination of the available plant food of a soil the plants are brought into requisition, so here experiments had to be made in connection with various domestic animals in order to determine the amount of these ingredients which served as nourishment when taken into the system. Tables giving the coefficients of digestion of the constituents of the feeding stuffs, therefore, always accompany the tables of analyses. In addition to all this, experiments have been made with domestic animals to establish the best proportion and amount of these constituents for the purpose of maintenance and

development as well as for the production of work, milk, flesh, Pat, eto. 3. As in the eai of commercial Pertil izerg, here again the work of the rhemhfl controls the sale of con. ntral I f< 'iug e

stuffs, so that, Ihc puivli.i

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•'I' '' commodities, which are thrown upon

the market in Unmet • quantities, is m Nun-<| against adulteration,