For animal food must always supply a large part of man s ration
The matter of meat-production is one of vital importance to the human race, for animal food must always supply a large part of man's ration.
Live stock of various kinds consume the coarser foods, like the grasses, hays, and grains, which man cannot use. As a result of this consumption they store in their bodies the exact substances required for building up the tissues of man's body.
Source: Agriculture for Beginners
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