CATTLE AND HOG PEOBLEMS 81 



SILOS 



92. Silos are built with rigid, smooth, perpendicular walls, 

 which are air-tight to prevent fermentation of the ensilage. 



93. Thirty pounds is the average weight of 1 cu. ft. of 

 corn ensilage in a small silo. 



94. One cubic foot of ensilage per head is the usual 

 daily ration. 



EXERCISE 



1. Assuming that a cow is fed daily 30 Ib. of ensilage for 

 a period of 180 da., what must be the capacity in cubic feet 

 of a silo for a herd of 12 ? 



2. If the silo in problem 1 is round, with a diameter of 

 10 ft., what must be the height ? 



3. Estimating 10 tons of corn and fodder to the acre, how 

 many acres will be required to fill the silo in problem 2 ? 



4. How many tons of ensilage in a silo 10 ft. in diameter 

 and 29 ft. high ? How many acres of corn (10 tons to the 

 acre) will it hold ? How many cows will it feed for 180 da. ? 



CATTLE AND HOG PROBLEMS 



95. Good authority places the weight of calves at birth 

 as follows : 



Light-weight calves 40-60 Ib. 



Average calves 60-80 Ib. 



Heavy calves . 80-110 Ib. 



96. On an average li gal. of fresh milk will produce 1 Ib. 

 of gain, live weight. The suckling calf should gain on an 

 average 2 Ib. per day. The fat calf dressed is from 40% 

 to 50% of its live weight, and cattle from 50% to 60% of 

 their live weight. 



97. Count 8 Ib. of milk to the gallon. 



