276 SOILING CROPS AND THE SILO. 



foot of settled silage will weigh about forty pounds, 

 or, in other words, that a cubic foot of such silage 

 will supply a head of cattle with all that it ought to 

 have of that kind of food for one day. On such a 

 basis the proper size for a silo not yet built can easily 

 be computed. 



If the silo is square or oblong, the length in feet 

 inside multiplied by the width and again by the 

 hight, will give the entire number of cubic feet in 

 the silo. The number of days during which an 

 animal is to be fed on the basis stated above multi- 

 plied by one will give the number of cubic feet of 

 silage required to feed one animal for the requisite 

 time. This divided into the cubic feet in the silo 

 after one-fourth has been deducted from the same, 

 will give the whole number of cows to be f^d thus 

 for the time fixed upon. 



For example : — -Suppose a silo is to be built to 

 meet the needs of twenty cows for six months in the 

 year. One cow will consume the silage in 180 

 cubic feet in that time if fed forty pounds of silage 

 daily, and twenty cows will consume the silage in 

 3,600 cubic feet. But since one-fourth of the space 

 is waste one-third of 3,600 cubic feet or 1,200 cubic 

 feet must be added to give the capacity of the silo 

 required which would make 4,800 cubic feet. Now 

 suppose twenty-fi^'e feet is fixed upon as the higlit 

 for the silo and twelve feet as the width inside, one 

 foot in length of such a silo will hold 300 cubic 

 feet of silage. To hold 4,800 cubic feet therefore 

 would require s silo sixteen feet long inside. 



To find the contents of a round silo in cubic 

 feet, multiply the square of the diameter, in feet, 



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