INCREASE 195 



food for growth should be of a readily digestible character 

 and, therefore, as a rule, only slight additions would have to 

 be made on this account. In general, o'4 Ib. of digestible 

 protein and i Ib. of digestible starch, or the equivalent of the 

 same in other forms, will be sufficient for an increase of 2 Ibs. 

 live weight due to growth. This is expressed by the formula 



where P is the amount (Ibs.) of digestible protein, C is the 

 amount of digestible non-nitrogenous nutrients, reckoned as 

 starch, and I is the increase (Ibs.) due to growth per day. 



These quantities of nutrients are, of course, to be given 

 in addition to what is required for simple maintenance. The 

 latter depends upon the size of the animals, and can be 

 determined by the formulae (pp. 128, 130). While the animals 

 are still young the maintenance rations should not consist 

 entirely of coarse fodders such as hay and straw;, and 

 quantities of the more readily digestible roots, cabbage, maize, 

 etc., are generally substituted for a portion of the former. 

 This, of course, does not affect the amounts of digestible 

 nutrients required either for maintenance or growth ; but any 

 excess or deficiency in either portion of the total ration can 

 be used to compensate deficiency or excess in the other. 



For example, the maintenance ration for a calf of 300 Ibs. 

 live weight, calculated by the formula, is 15 kt. This could 

 be obtained from 85 Ibs. of hay, from 47 Ibs. of swedes, 

 or from 5 Ibs. of hay and 18 Ibs. of swedes. To whichever 

 of these rations is selected there must be added the special 

 food for growth ; and as the ration, when it consists wholly or 

 partly of swedes, will be deficient in protein, the allowance of 

 cake must be increased. The following quantities would form 

 a complete ration : 5 Ibs. hay, 18 Ibs. swedes, if Ibs. linseed 

 cake, and ib. middlings. 



If it is desired to state the requirements of the animals in 

 the form of a feeding standard, this can be done as follows : 

 At the same rate as for adult oxen, the allowance of protein 

 for maintenance should be 0*23 Ib., and 15 kt. corresponds 

 to 4 Ibs. of starch. Add 0-4 Ib. of protein and i Ib. of 



