The Ensilage of Fodder. 



239 



ing 40 Ibs. of silage daily per cow, the silo being 30 ft. deep and hold- 

 ing sufficient silage for 6 months: 



Number of cows to be fed 30 40 50 



Diameter in feet . . 15. 2 17. 5 19. 6 

 Tons of silage held__ 108.0 144.0 180.0 



60 70 



23.2 

 252.0 



21.4 

 216.0 



80 



24.8 

 288.0 



90 100 



26.3 

 324.0 



27.7 

 360.0 



It is shown that, where 30 cows are to be fed a daily allowance of 

 40 Ibs. of silage each for 6 months, a silo 30 feet deep should have an 

 inside diameter of 15.2 ft., while one of the same depth holding 6 

 months' feed for 100 cows should have an inside diameter of 27.7 ft. 



374. Silo economy. King 1 states that a silo 36 ft. in depth will 

 store 5 times as much feed as one 12 ft. deep, due to the greater 

 compactness of the stored mass. A silo 20 ft. in diameter will hold 

 4 times as much as one having half that diameter, while it costs but 

 twice as much to build. Gurler 2 advises against silos over 25 ft. in 

 diameter on account of the increased labor involved in removing the 

 silage. He found no objections to silos 38 ft. in depth. 



375. Capacity of the silo. The next table, likewise by King, 3 

 gives the capacity of cylindrical silos of different depths and varying 

 inside diameters. 



Approximate capacity of cylindrical silos stated in tons of corn silage. 



The table shows that a silo 20 ft. deep and 15 ft. in diameter will 

 hold about 59 tons of cut corn silage, while one 32 ft. deep and 26 

 ft. in diameter will hold about 346 tons. 



1 Physics of Agriculture. 



2 The Farm Dairy. 



3 Loc. cit. 



