Elementary agriculture with practical arithmetic Elementary agriculture with practical arithmetic elementaryagricu01hatc Year: 1906 38 ELEMENTARY AGRICULTURE grain does not 'fill well,' as the farmer says. The ground has been carefully prepared, tilled and drained. What is he to do? Nothing is simpler. Apply phos- phoric acid fertilizers to the soil. Here again, barn- yard manure, because it is a perfect fertilizer, is the best and easiest one to be had. Ground bones, burned bones, marls and rock phosphates are the fertilizers of commerce, and are being more and more extensively used. THE
Elementary agriculture with practical arithmetic Elementary agriculture with practical arithmetic elementaryagricu01hatc Year: 1906 38 ELEMENTARY AGRICULTURE grain does not 'fill well,' as the farmer says. The ground has been carefully prepared, tilled and drained. What is he to do? Nothing is simpler. Apply phos- phoric acid fertilizers to the soil. Here again, barn- yard manure, because it is a perfect fertilizer, is the best and easiest one to be had. Ground bones, burned bones, marls and rock phosphates are the fertilizers of commerce, and are being more and more extensively used. THE EFFECT OF FERTILIZERS. Fertilized with 560 lbs. Fertilized with 720 lbs. of mixed Nitrate, Potash No fertilizers. 2,110 of mixed Nitrate, Potash and Phosphate. 4,310 lbs. lbs. of hay per acre. and Phosphate. 6,610 lbs. of hay per acre. of hay per acre. (Cornell University Bulletin.) Potash is especially essential to the production of fruits, potatoes and root crops. In most cases, when other conditions are perfect, under-sized, shriveled
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