standards, it will have been observed, are of mu'0h wider nutritive 

 ratio than the Wolff-Lehmann under similar conditions. 



Further, we have seldom found it profitable to feed more than 

 one pound of meal mixture or concentrate to about four pounds of 

 milk produced. Of course, if the cow was giving 30 Ibs. of milk on 

 the ration mentioned in the inquiry, she is practically certain to give 

 considerably more, probably 35 to 40 Ibs. on the new ration as 

 suggested. 



Problem II. A farmer has at his disposition clover hay, mixed 

 hay, wheat chaff, mangels and oat straw. He has also a small 

 amount of oats and he can conveniently purchase gluten meal, bran 

 and cotton seed meal. He is particularly anxious to produce a large 

 quantity of milk. His cows are for the most part Holstein grades 

 and not long calved. What would be a good ration compounded 

 from all or any of the feeds mentioned? 



Solution. Nothing is said of the quantities of different feeds 

 available hence it will have to be taken for granted that they are 

 any and all, except oats, available in any quantities desired. 



The Holstein grade being usually a large cow of 1,200 to 1,500 

 Ibs., a ration must be compiled accordingly. As already indicated, 

 variety is an excellent quality in a ration, so, although a suitable 

 ration might be prepared from which some of the feeds could be 

 left out, it will probably be found advisable to include them all in 

 one proportion or another. 



The ration given in the following table suggests itself: 



