44 



SILOS: CONSTRUCTION AND SERVICE 



feed used daily, and the amount which should be used from 

 a silo of any size, may be estimated. These tables are taken 

 from Bulletin 100, Iowa agricultural experiment station, 

 Table II being furnished by the Animal Husbandry Depart- 

 ment of the Iowa State College. 



Table II. Amounts of silage required per day for various kinds 

 of stock. 



Table I may be used in connection with Table II to 

 determine the size of silo needed to fulfil various conditions. 

 For instance, if the silage is to be fed to a herd of 40 dairy 

 cattle, at the rate of 40 pounds per head per day, a silo 16 or 

 18 feet in diameter will be satisfactory. In case a smaller 

 type of cattle were kept, they would eat about 30 pounds each 

 amounting to 1200 pounds per day. As seen from the right- 

 hand column of Table I, this is not sufficient for a 16-foot 

 silo; therefore a 14-foot silo should be used, unless some 

 young stock is kept in addition to the 40 mentioned. 



It should be borne in mind that if the size of the herd is 

 likely to vary from year to year, the diameter should be 

 such that the smallest probable herd would still use 2 inches 



