One bushel of red clover seed will produce under favorable conditions-12 tons of 16 per cent protein feed, and 400 pounds of residual nitrogen; enough to produce 100 to 125 extra bushels of corn. The value of legumes to a permanent and efficient agriculture, therefore, demands an adequate annual seed supply to plant the millions of acres of cultivated crop land that depend upon legumes for the maintenance of soil productivity. Efficiency in the production of legume seeds is the keystone to ample acreages of these soil-builders.
Beard, D. F.; Dunham, W. E.; and Reese, C. A., "Honeybees Increase Clover Seed Production" (1950). Ba. Paper 5.
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