INCREASE 209 



described. To avoid unnecessary repetition these may be 

 briefly stated as follows : 



(1) For growth, N = o-yG'j P = j C= 



(2) For fattening, N = 2 F; P = ^; C=^ 



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

 the protein (Ibs.), and C the non-nitrogenous nutrients as 

 starch (Ibs.). As before, G and F are the amounts (Ibs.) of 

 the increase due to growth and fattening respectively. 



Substituting the values previously obtained for G and F, 

 we get 



(l} N _r4(M'-M) 



3 M' 



o-28(M' M) ri2(M > M) 



3 M' 3M' 



The total amounts of nutrients required by young pigs for 

 increase (growth and fattening jointly), as apart from mainten- 

 ance may therefore be expressed by the following formulae l : 



2 8(M'-M) < _ 2(M' - M 



3 M' ( 3M' 



_ ro- 



rVi2(M'-M) C 



M' 5 r 



3 M' 



The calculated amounts of protein and of non-nitrogenous 

 nutrients required for maintenance, growth, and fattening, when 

 added together, agree fairly closely with the amounts of 

 digestible nutrients in the food actually consumed. It follows 

 that, in these cases, practically the whole of the nutrients in 



1 N.B. These formulae are capable of further simplification, 



F 



