FEEDING 93 



crops to make the albuminoid ratio right. 

 Roots by themselves have an albuminoid ratio 

 of about I : lo, oat straw about i : 40, it is 

 thus evident that something must be added to 

 these two food-stuffs that is rich in albuminoids, 

 such as cotton or linseed cakes, till the albumi- 

 noid ratio is right ; e.g., if the stock were 

 intended to receive a daily ration of 20 lbs. 

 of oat straw and 70 lbs. of swedes, then, if it be 

 calculated out, it will be found that, say, 8 lbs. of 

 cotton cake would make the albuminoid ratio 

 of the ration right. Market rates will largely 

 determine what particular food-stuff should be 

 bought to supplement the roots and straw, or a 

 mixture of several may prove cheaper, in fact, 

 recent experiments have shown that it is nearly 

 always advisable to use a mixture of concentrates 

 rather than only one. 



Now we have seen that where the bulk of 

 the home-grown food-stuffs are roots and straw, 

 as would be the case on farms largely arable, 

 then nitrogenous food-stuffs, such as cakes, have 

 to be bought in. On stock farms, however, 

 such as a dairy farm, where hay forms the bulk 

 of the home-grown food-stuffs, the question is 

 different. 



