994 
Journal of Agricultural Research 
Vol. XXXI, No. 10 
It will be noted that two treatments of the experimental data are 
given in this table, treatment A representing the usual procedure, 
and treatment B the same except for the elimination of the data for 
Periods V and YI, there being, in the writers 7 opinion, sufficient 
warrant for pointing out in this way the influence of the data for 
Periods V and VI, but not sufficient, at this time, to warrant ex¬ 
cluding these data from consideration. 
The influence of the high heat production in Periods V and VI is 
reflected, in treatment A, in (1) high average heat-increment values 
in all periods, but especially in Periods II, IV, and VI, and (2) ab¬ 
normally low net energy values for maintenance in all periods, but 
especially in Periods II, IV, and VI. Obviously these latter values 
are wrong. 
Treatment B, exhibiting the computation of the maintenance 
requirement with the data for Periods V and VI excluded, is con¬ 
sistent within itself and with what is known of the maintenance 
requirement of steers. 
NET-ENERGY VALUES 
The net-energy value of the feeds is computed by adding the body 
gain of energy to the maintenance requirement, or subtracting the 
body loss of energy from the same. This gives the total amount of 
net energy for the feed of each period, and this value divided by the 
kilograms of dry feed involved gives the net energy per kilogram of 
dry matter (Table X). 
Table X.— Net-energy values of alfalfa hay and alfalfa meal 
Feeding stuff and period No. 
Dry 
matter 
eaten 
Metabo¬ 
lizable 
energy 
Average 
main¬ 
tenance 
require¬ 
ment 
of net 
energy 
Body 
gain of 
energy 
Total 
net 
energy 
of ration 
Net 
energy 
per kilo¬ 
gram of 
dry 
matter 
Utiliza¬ 
tion of 
metabo¬ 
lizable 
energy 
Treatment A: 
Alfalfa hay— 
I..... 
Kg. 
6.6383 
5.3202 
3.0524 
Calories 
13,337 
10,650 
6,510 
Calories 
3,877 
3,877 
3,877 
Calories 
+2,203 
+807 
-884 
Calories 
6,080 
4,684 
2,993 
Calories 
916 
880 
981 
Per cent 
<45.59 
43.98 
45.98 
III..... 
V_ 
Average_ 1 
926 
925 
882 
1,140 
45.18 
46.60 
44.75 
54.59 
Alfalfa meal— 1 
IV__j 
VI... 
6.6707 
5.4078 
3.1549 
13,238 
10,661 
6,587 
3,877 
3,877 
3,877 
+2,292 
+894 
-281 
6,169 
4,771 
3,596 
Average_ 
982 
1,036 
1,031 
48.65 
51.58 
51.48 
Treatment B: 
Alfalfa hay— 
I.__ 
6.6383 
5.3202 
13, .337 
10,650 
4,676 
4,676 
+2,203 
+807 
6,879 
5,483 
III”_ 
Average . 
1,034 
1,045 
1,030 
51.53 
52.64 
52.25 
Alfalfa meal— 
II... 
6.6707 
5.4078 
13,238 
10,661 
4,676 
4,676 
+2,292 
+894 
6,968 
5,570 
IV__ 
Average_ 
1 
1,038 
52.45 
1 
A figure of similar significance, expressing the percentage of utiliza¬ 
tion of the metabolizable energy, is obtained by dividing the net 
energy by the metabolizable energy. 
