INCREASE 203 



Expressed as a formula, this conclusion would read as 

 follows : 



N = 2-61 P = o'iN = 0-26! ; C = o- 9 N = 2-34! 



N is the required amount (Ibs.) of total digestible nutrients, 

 I is the average daily increase (Ibs.) of live weight, P is 

 the minimum amount (Ibs.) of protein, and C is the amount of 

 non-nitrogenous nutrients reckoned as starch. 



It will be seen, therefore, that the requirements of sheep 

 for fattening as apart from maintenance are somewhat less 

 than those of oxen, notwithstanding the rather larger propor- 

 tion of fat in the increase. This of course results from the 

 assumption, not hitherto proved, that sheep store up a larger 

 proportion of the nutrients than oxen do. 



If the average rate of increase in live weight be taken as 

 one-third of a pound per day, the actual requirements of the 

 animals for fattening would be 0*86 Ib. of total nutrients ; or 

 counting the protein separately 0*09 Ib. of digestible protein 

 and 0*78 Ib. of " starch " per head. 



In order to express the total requirements in the form of a 

 feeding standard it may be assumed that the sheep have an 

 average live weight of 100 Ibs. per head at the beginning of 

 the fattening period. The maintenance requirements of animals 

 (sheep) of this size were estimated at 4 kt., which is equal to 

 o'o8 Ib. of digestible protein and 0-95 Ib. of starch. If the 

 two quantities are now added together, the result is 



Protein. Starch. 



For maintenance .... 0*08 0*95 



,, fattening O'o8 0*78 



Total feeding standard . o - i6 1*73 



These quantities are per TOO Ibs. live weight. If it is 

 desired to make the feeding standard comparable with that for 

 oxen and other animals, the amounts of nutrients should be 

 multiplied by 10, so as to give quantities per 1000 Ibs. live 

 weight. This standard corresponds closely with those of 

 Wolff, Kellner, and others, but it is open to the same 

 objections as those previously considered. 



