FaRTY-THIRD ANNUAL CONVENTION 227 



Should the silage have been partially fed out and it be 

 desired to know the remaining amount, compute the tonnage 

 (as above) for the silo when filling ceases. Then obtain the 

 distance -between the present level and the level when filling 

 ceased, and compute the tonnage for this space. The difference 

 between these two tonnages is a close approximation to the tons 

 remaining in the silo. 



The weight of silage per cubic foot is not the same for each 

 foot in depth, but the deeper the silo the heavier each cubic foot 

 of silage. As the silage becomes deeper the percentage of in- 

 crease in weight becomes less. The capacity of a silo not only 

 varies with the depth, as shown by the weights var}dng with the 

 depth, but it also varies with the square of the diameter, — that 

 is, a silo 8 feet in diameter will hold four times as much as one 

 4 feet in diameter. 



Relative Dimensions of Silos 



If two silos have the same capacity but vary in height 

 and diameter, the taller and narrower silo will be somewhat 

 more expensive, but it will have much less spoiled silage on top 

 each year, which will compensate for the difference in original 

 cost. 



Size of Sllo 



The silage must be fed off at the rate of about ij^ inches 

 per day during the warm winter days and twice as fast in the 

 summer in order to prevent spoiling. The diameter of the silo 

 needed must be determined by the number and kind of stock 

 being fed from it in summer, if summer and winter feeding is 

 carried on ; or by the number and kind being fed in the winter, 

 if winter feeding only is practiced. 



The height of the silo should be determined by the length 

 of feeding period. 



The first step in deciding the size of the silo is to determine 

 the kind of live stock and the number to be fed. The number 

 of days the stock is to be fed determines the capacity required, 

 and from this we get the diameter and height of the silo. If it 

 is anticipated that at any time of the year more stock than the 



