32 



FARM ARITHMETIC. 



3. In the grain of the entire crop of corn there are of 

 nitrogen 3,180,000,000 pounds ; of phosphoric acid, 1,200,- 

 000,000 pounds; of potash 600,000,000 pounds; in the 

 stalks, of nitrogen 4,805,000,000 pounds; of phosphoric 

 acid 1,441,500,000 pounds ; of potash 6,727,000,000. The 

 total amount of plant food consumed is 17,953,500,000 

 pounds. 



4. In the total United States corn crop the grain will 

 weigh 84,000,000 tons, the fodder 240,250,000 tons. The 

 grain will contain 2,490,000 tons of plant food, and the 



FEEDING CATTLE IN THE FIELD. 

 Hay and grain are placed in racks and troughs and the steers feed at will. 



stover 6,486,750 tons ; cars, 20 tons each, required for the 

 grain, 4,200,000; for the plant food contained in the 

 grain, 122,250. 



5. For the corn stover 24,025,000 cars holding 10 tons 

 each will be required, and for the plant food in it 

 324,337.5 cars holding 20 tons each. 



