SILOS. 193 



quantity necessary for the year's supply must be esti- 

 mated. The quantity of silage depends upon (1) the 

 amount fed daily to each animal, (2) number of animals 

 to be fed, (3) the length of silage feeding period. 



692. How many tons of silage will be required for a 

 dairy herd of 25 cows when an average of 40 pounds is 

 fed daily to each animal for 180 days ? 



Process : 



25 X 40 X180 = 180,000 pounds. 

 180,000 -f- 2,000 = 90 tons. 



693. How many tons of silage will be required for a 

 dairy herd of 30 cows, the average feed of 40 pounds be- 

 ing given ? 



694. A farmer, calculating the amount of silage neces- 

 sary for his cattle, plans to feed 20 cows, each 50 pounds 

 daily; 15 cows, each 40 pounds daily; 10 cows, each 30 

 potmds daily ; and 25 calves, each an average of 15 pounds 

 daily. How many tons of silage will be required for nine 

 months (270 days) feeding? 



695. His neighbor plans to feed 20 cows, each 50 

 pounds daily for 90 days, then 40 pounds daily for the 

 next 90 days, and 30 pounds daily for the following 75 

 days. He .also plans to feed 15 other cows each 40 pounds 

 for 150 days, and 25 pounds each for the following 100 

 days; and also 30 calves an average of 15 pounds each 

 for 180 days. How many tons of silage will be required ? 



Capacity of silos. Corn silage weighs from 25 pounds 

 to 50 pounds per cubic foot according to the depth in the 

 silo from which it is taken, and the amount of moisture 

 it contains. Where a silo is constructed and filled prop- 

 erly, the average weight of the contents will average about 

 40 pounds to the cubic foot. This means 50 cubic feet 

 to every ton. The capacity of a silo depends on its depth 

 and diameter. The number of cattle to be fed will con- 



