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Show PHOSPHORUS FOR THE LAND Thousand Pounds of Raw Rock Phosphate Phos-phate Applied Per Acre Once in Four Years Is Favored. Phosphorus can be secured in no other way than to buy it. In its cheapest form it costs three to four ents a pound. There are 17 pounds in 100 bushels of corn. If 50 bushel crops are raised about 30 cents per acre annually would restore the phos-nberous. phos-nberous. This is merely the cost of maintenance, and the fertility won d not increase. This element usually limits the crop. More should be supplied sup-plied than is taken off. It is considered consider-ed 1 000 pounds of raw rock phosphate applied per aore once in four years is a reasonable expenditure bmldmg up the soil rapilly and profitably. Thn, will supply phosphorus about twice as fast as it will be removed in large crops. Illinois Farmers' Institute. |