Maintenance Rations 299 



Still later, Kellner, basing his figures upon extensive 

 researches by himself and associates, which are the most 

 elaborate so far made, gives us the following as the 

 minimum quantities wliich will satisfy the maintenance 

 needs of mature animals of different weights: 



The necessary quantity of available nutrients may 

 be larger if only verj' ripe, coarse food is fed, than if 

 the ration is part grain, because of the somewhat less 

 available energy from the digested part of the former. 

 In order to express a maintenance ration for bovines 

 in terms of hay and grain, there are given in this con- 

 nection several mixtures, which, on the basis of aver- 

 age composition and digestibility, will furnish quite 

 closely the necessary digestible matter, using Armsby's 

 conclusions as the basis for calculation : 



f 12 lb 

 I 3 lb 



To maintain a 1,000 -pound animal 



L2 l]>s. average timothy hay. ( 23 lbs. mature corn silage. 



bs. wheat bran. '6 \ 5 lbs. timothy hay. 



i 3 lbs. wheat bran, 

 r 8 lbs. corn stover. ( 5 lbs. timothy hay. 



2^6 lbs. clover hay. 4^5 lbs. clover hay. 



( 3 lbs. corn and cob meal. '- 4 lbs. corn and cob meal. 



5. 15% lbs. good mixed hay. 



