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)
TENTHi ANNUAL CONVENTION manure, prohably not more than two-thirds of it ever gets back to the farm, because of improper methods of hallld- ling the manure. While the loss is probably not so great in dairy farming where only dairy products are sold as where meat pro(lucts are so0l, still the loss is consideral)le. When a thoousan(l-pounki fat steer is sold from the farm 7 poutlld~ of plhosPllorus go with it. Ini 1000 pounds of fat hogs, 3 pounds of pllosphorus are sold. In 5.;0 pourLls onli two-tenthis of a poull(l of phosphorus are sold. if only butter was sold from the farm and and all of the manure could be saved an(l returned to the land without loss, the depletion of the soil plh(osphorus would go on very slowly. But, of course, it is not possible to do this, either to sell only butter, 4or to save all of the manure. So we see, whether the systeui is grain farming, where fhe grain is fed for the production of meat or milk, tile result is the same. Tile other elements, nitrogen andl potassiumnl a'so d is- appeal from the fariii under either the grain or live- stock system of farming, but not to the satmle extent. 0)nly about two-thirds of the nitro-en and one-fourth of the po- tassiulll is in the grain, the lest being in the stalks, a 1(1 straws. When the (grain is fed about one-fcurtli of the nitrogen is retained by the animal but practically none of potassium. The nitrogen, to maintain the supply in the soil, may be secured from the air without cost by grow- ing legume crops, while the supply of potassium will practically be maintained, if good use is made of all stalks and straws, and the manure carefully saved. On most soils of Illinois and southern Wisconsin the problem of the farmer is to maintain the supply of nitro- gen and phosphorus. In providing for the nitrogen sulply of humius will also be provided for. The potassium content of the normal soils of this region is so great that there is no liklihood of it ever being reduced to the point where it will be necessary to use commercial potassium. On peaty ull(d alkali soils potassium can be used with profit. 7(,
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