Rural Arithmetic; Starting Children to Think And Figure On Home And Its Improvement
The book Rural Arithmetic; Starting Children to Think And Figure On Home And Its Improvement was written by author John E John Edward Calfee Here you can read free online of Rural Arithmetic; Starting Children to Think And Figure On Home And Its Improvement book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Rural Arithmetic; Starting Children to Think And Figure On Home And Its Improvement a good or bad book?
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3. What is the tax upon the soil in growing a 50 acre field of wheat, averaging 15 bushels per acre? 30 bushels i)er acre? 4. What is the value of the plant food removed from the soil ill growing 35 bushels of corn, nitrogen being quo- ted in tin' market at 22c a pound, Phosphoric acid 5c and Potasli Gl ? 5 A father tells his son that he may have all the wlieat he can grow on a 10 acre field if he will pay, at commercial prices, (see problem 4) for the plant food re- moved from the soil; if the... son grows 15 bu. per acre, how much does he owe his father ? THE COST OF RESTORING PLANT FOOD TO THE SOIL Nitrogen, Phosphoric acid, and Potash may be returned to the soil by means of commercial fertilizer, straw, and manures. This table gives some idea of how plant food may be returned to the soil, and what it is worth per ton at com- mercial prices. Nitrogen 22c per pound; Potash 6c; and Phosphoric acid 5c. Students should complete the table with values based on commercial prices, and make a duplicate copy on a large piece of pasteboard and give to their parents for inspection and for future reference.
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