toy eR Os cate iy get Ais ek aed 
wens wo | 8 c 
eee ee tit 
A STUDY OF RATIONS FED TO MILCH COWS. - = 139 
The data obtained in the dairy herd tests during the winter 
of 1899-1900 are given in detail in Tables 34-41 below. For 
each herd there are two tables. The first table gives the fol- 
lowing statistics for each cow in the herd: The breed, age and 
estimated weight; the number of months since last calf and, 
where known, the time when due; the minimum, maximum 
and average daily yield of milk, percentage of fat in each day’s 
milk, and daily yield of butter fat, for both the first and second 
tests. The names of the different breeds as given in the second 
column are abbreviated as follows: A=Ayrshire; D=Dur- 
ham; Gy=Guernsey; H=Holstein; J=Jersey. ‘The letter G 
before the initial of a breed signifies that the cow was a grade. 
The data in the second table give the average daily ration 
per cow, as calculated for the whole herd in the first test, and 
for the number of cows in each group in the second test. 
They show the weights of coarse and concentrated feeds in the 
ration, the amounts of digestible nutrients they were estimated 
to furnish, their fuel value, nutritive ratio, total cost, and net 
cost as corrected for the value of the manure. 
