Southern Wisconsin Cheesemakers' and Dairymen's Association / Proceedings of the tenth annual meeting of the Southern Wisconsin Cheesemakers' and Dairymen's Association held at Monroe, Wisconsin, Thurs. and Fri., January 27 and 28, 1910
Readheimer, J. E.
Phosphorus as a fertilizer on the dairy farm, pp. 75-83 PDF (1.9 MB)
SOUTHERN WIS. CHEESEMAKERS' & DAIRYMEN'S ASS'N. 75 Phosphorus as a Fertilizer on the Dairy Farm Prof. J. E. Readheimer, University of Illircis Phosphorus must always play an important part in any system of permanent agriculture. It is a b-;olutely neces- sary for the growth and development of all plant and ani- mal life. It is found in every cell and without it none of the cell activities could go on. Whether the system of farming is strictly grain or strictly live-stock, phosphorus is largely used in the formation of the seed. About three- fourths of the phosphorus required for the ordinary farm crops, corn, oats, wheat, goes to form the grain, and the grain is the part of the crop sold from the farm. The grain of a hundred bushel crop of corn requires 17 pounds of phosphorus while the stalks require only 6 pounds. The grain of a hundred bushel crop of oats requires 11 pounds of phosphorus, while the straw requires only 5 pounds. The grain of a fifty bushel crop of wheat requires 12 pounds of phosphorus, while the straw requires only 4 pounds. When the products of the farm are fed to live-stock a large part of the phosphorus, probably one-fourth, is re- tained by the animal body to build up the bones and to as- sist the organs is performing their life activities. Bones are composed almost wholly of calcium phosphate, a com- poun(l of calcium, oxyggn, and phosphorus. Of the three- fourths of the phosphorus that passes thru the animal in the form of manure, probably not more than two-thirds of the the phosphorus that through the animal in form of
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