COMPUTATION OF RATIONS 81 
9. Ration is satisfactory——In this ration no serious 
faults are noticed. We have the correct amount of protein, 
but an excess in carbohydrates of .28 pounds. The dry 
matter is slightly under the standard. This does not 
matter so long as the quantity does not so greatly over- 
run the standard as to give greater bulk than the average 
cow has room to accommodate. A deficiency in dry 
matter can be evident and still not affect the efficiency of 
the ration. The excess of the fuel foods is so small as 
to be of no importance. Were a pound less of clover hay 
and a quarter of a pound more of cottonseed meal used 
in the ration, the ration would correspond to the standard 
with considerable exactness. 
Ration For 
Maintenance 
Ration For Extra For 
Maintenance 22 pounds Milk 
Ration For Extra For 
Maintenance 27.5 pounds Milk 
RATIONS ae WITH RATE OF MILK YIELD 
Food requir ts for are the same, but more food is necessary in 
Proportion as the yield of milk is increased. Heavy milking cows, therefore, re- 
quire the biggest rations. 
10. Feeding for heavy milkers.—Suppose, now, a ration 
is wanted for the same cows at another period when they 
are giving more milk than in the case just cited, say 27.5 
pounds daily. How shall we proceed to adjust this 
ration to the new requirements, using as nearly as pos- 
sible the same feeding stuffs as before? The first step 
is to consult the standard. This we find calls for 32 
pounds of dry matter; 3.3 pounds of protein; 13 pounds 
of carbohydrates; 0.8 pounds of fat. 
