Cattle fed on synthetic urea like it and grow fat. This announcement from the University of Wisconsin last week concluded its five-year study of the nutritive value of synthetic urea, opened a new era in feeds, perhaps in foods. Urea is a reasonably priced, simple nitrogen compound made chemically from nothing more than ammonia and carbon dioxide. Not a protein, synthetic urea is so closely related to protein that it can replace a major part of the vegetable proteins in cattle feed. Urea is manufactured in large quantity for use in many types of plastics and as a rich fertilizer. Caution:...
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