1889.] PUBLIC DOCUMENT — No. 4. 425 



hay and thirty-four pounds of carrots were used, under 

 otherwise corresponding circumstances, as a substitute for 

 five pounds of hay and twenty-nine pounds of corn ensilage. 

 The amount of dry vegetable matter contained in the hay 

 fed with roots and in the hay fed with corn ensilage was 

 practically the same in both instances. The feed of the 

 sixth feeding period, containing carrots as an ingredient, is 

 thus the most nutritive and also the most expensive. 



The results of the experiment led us to the following 

 conclusions : — 



The nutritive value of our dry corn fodder (stover) com- 

 pares well with that of an average quality of English hay ; 

 the same may be said of good corn ensilage in place of from 

 one-half to two-thirds of the customary amount of hay. 



The nutritive value of our dry corn fodder (stover) and 

 of a good corn ensilage, taking into consideration pound for 

 pound of the dry vegetable matter they contain, has proved 

 in our case fully equal, if not superior, to that of the average 

 English hay. 



The nutritive feeding value of carrots, taking into con- 

 sideration pound for pound of the dry vegetable matter they 

 contain, exceeds that of the corn ensilage as an ingredient 

 of the daily diet, in place of a part (one-half) of the hay 

 fed. The conclusions thus far stated are in full agfreement 

 with those pointed out in our earlier experiments. 



The influence of the various diets used on the quality of 

 the milk seems to depend in a controlling degree on the con- 

 stitutional characteristics of the animal on trial. The effect 

 is not unfrequently in our case the reverse in different 

 animals depending on the same diet. 



The total cost of the feed for the production of milk is 

 lowest whenever corn fodder or corn ensilage have replaced, 

 in the whole or in part, English hay, under otherwise corre- 

 sponding circumstances. 



The net cost of feed consumed for the production of one 

 quart of milk during the various feeding periods, varies as 

 widely as from .34 cents to 1.6 cents in case of the same 

 cow. The net cost of the feed is obtained by deducting 

 eighty per cent, of the value of the fertilizing constituents 

 it contains. 



