228 AC.RICULTURli; OF MAINE. 



TABLE L* 



RELATION OF SIZE OF SILO TO SIZE OF HERD, FED 240 DAYS. 



No. Cows. Silage Consumed. Size of Silo. 



10 48 tons 10x31 



12 57 tons 10x35 



15 72 tons 11x36 



20 96 tons 12x39 



25 • 120 tons 13x40 



30 144 tons 15x37 



35 168 tons 16x38 



40 192 tons 17x39 



45 216 tons 18x39 



50 240 tons 19x39 



CAPACITY OF SILOS OF VARYING SIZES IN FEET. 

 Inside Diameter of Silo in Feet. 



ESSENTIALS OF A GOOD SILO. 



Under this heading I can do no better than to give you the 

 substance of a report of the agricuUm-al eng-ineers of Iowa 

 State College. These essentials are : 



Imperviousness of the Walls. — The fundamental principle 

 involved in preservation of silage is the retention of moisture 

 within the silage and the exclusion of air. For this reason the 

 silo wall must be nonporous. Moisture must be prevented from 

 passing in. 



^Mo. A. E. S.-Rul. 103. 



