FARM STRUCTURES 463 



The usual amount of silage fed per day to various classes of stock. 



Kind of stock Daily rations, pounds 



Beef cattle 



Wintering calves 8 months old 15 to 25 



Wintering breeding cows 30 to 50 



Fattening beef cattle, 18-22 months old 



First stage of fattening 20 to 30 



Latter stage of fattening ' 12 to 20 



Dairy cattle 30 to 50 



Sheep 



Wintering breeding sheep 3 to 5 



Fattening lambs 2 to 3 



Fattening sheep 3 to 4 



The preceding tables — which give the capacity of some of 

 the more common sizes of silos, the number of pounds of 

 silage which must be removed daily to lower the surface an 

 average of two inches, and an average ration for each of 

 various kinds of farm stock — should provide sufficient 

 information for deciding upon the size of silo to meet 

 ordinary requirements. 



To explain the use of these tables, suppose silage is to 

 be fed to 10 head of dairy cows, 8 head of calves, and 40 head 

 of beef stock, for 200 days. The amount of silage required 

 per day will be about as follows: 



10 dairy cows, 40 lbs. each 400 lbs. 



8 calves, 20 lbs. each 160 lbs. 



40 beef cattle, 20 lbs. each . . 800 lbs. 



Total silage fed per day 1360 lbs. 



Referring to the first table, it will be found that a silo 16 

 feet in diameter will furnish 1340 pounds of silage when 2 

 inches is fed daily; hence 36 feet, or 216 times 2 inches, will 

 be about the right height. Some allowance should be made 

 for settling. 



The Essentials of a Silo. To preserve silage a silo must 

 have impervious walls which will not permit air to enter or 



