84 PRINCIPLES OF FEEDING FARM ANIMALS 
Example 1, Details of Cost 
Dyeetble Energy values | Feed units 
in : 
er * 
No. Feed Roundes Cost Cost Ccst 
cents | Total per Total per Total per 
2 pounds] pound,| therms| therm, _unit, 
cents cents cents 
1 Fodder corn............ 10 13.8 .72 12.4 81 4 8.0 0.8 
2 | Alfalfa hay............. 50 53.0 94 34.4 1.45 2.0 1.0 
Bt Indian Comm. ceccnnwamae © 107 83.9 1.28 88.8 1.20 1.0 1.07 
4 Wheat bran............ 150 77.7 2.02 48.2 2.49 1.1 1.32 
5 | Linseed meal.......... .| 120 59.5 1.93 78.9 1.90 9 1.35, 
We note that the rank of the different feeds at the prices given 
is as follows: 
According to contents of digestible matter, 1, 2, 3, 5, 4. 
According to energy values, 1, 3, 2, 5, 4. 
According to feed-unit values, 1, 2, 3, 4, 5. 
The relative value of these feeds does not differ greatly whether 
one or the other of the methods of calculation be adopted; fodder 
corn is the cheapest feed according to all three methods of calcula- 
tion; alfalfa or corn meal comes next, and wheat bran and oil meal 
are the most expensive feeds. Where differences in the relative rank 
do occur, it is evident that the digestible matter gives an undue 
advantage in the case of coarse feeds, and that energy values give 
corn too much credit over the protein feeds, wheat bran and oil meal, 
except when fed to fattening steers, in which case the figures given 
for these values are doubtless the best available. The rank based 
on feed-unit values, on the other hand, is likely to prove the more 
correct in case of feeding growing animals, milch cows and sheep, 
Example 2.—Both cotton-seed meal and linseed meal can be 
bought at $32 a ton, gluten feed at $25 a ton, and dried distillers’ 
grains at $28 a ton, which should be bought for feeding dairy cows, 
supplementary to corn silage and clover hay. By similar methods of 
calculation as before we have the following data: 
Example 2, Details of Cost 
ae Papeete Energy values Feed units 
No. Feed ; sealer Cost Cost Cost 
per er er 
cents | Total pound,| Total tien Total unit, 
cents cents cents 
1 | Gluten feed............ 125 80.6 1.55 79.3 1.58 9 1.13 
2 | Distillers’ grains...... 140 88.6 1.58 79.2 1.77 9 1.26 | 
= | Cotton-seed meal. . 160 80.6 1.99 84.2 1.90 8 1.28 - 
4 | Linseed meal...... 160 T717 2.06 78.9 9 1.44 
