Ration Experiments With Swine 
5 
1908-1909 EXPERIMENTS 
Six lots of ten head each were fed. The pens averaged 47 to 48 
pounds per pig when put on feed. They were uniform in breeding, 
age, and condition. At the close of fourteen weeks feeding, the lots 
ranged from an average weight of 109 pounds per head to 143 pounds 
per head. No attempt was made to finish the pigs out to a two hun¬ 
dred pound weight or heavier, as the fourteen weeks feeding period 
shows comparative results just as well as feeding for a longer period. 
The following table gives the results: 
FEED FOR GAIN AND COST OF GAIN. 1908-1909. 
(Ten Pigs in Each Pen) 
Av. Gain 
Cost of Stand- 
Pen 
per head 
Pounds of Feed for 100 Lbs. Gain 
Feed for 
ing 
N 
0 . Ration 
14 weeks 
r “ 
K 
X 
100 lbs. 
of 
(lbs.) 
Corn 
Barley Shorts Tankage 
Gain* 
Lots 
1 
Corn (3) ; Barley (3) ; 
Selected Tankage (1) 
143.1 
191 
191 .... 64 
5.10 
3 
2 
Corn (6) ; Fertilizer 
Tankage (1) . 
109.0 
400 
. 67 
4.84 
1 
3 
Corn(6) ; Selected Tank- 
age (1) t. 
128.2 
379 
. 63 
5.05 
2 
4 
Corn(3) ; Selected Tank- 
age (1) . 
117.0 
345 
. 115 
5.75 
6 
5 
First 4 weeks, Corn (3) A 
Selected Tankage (1) 
. . . 
.... .... ... 
.... 
Next 4 weeks, Corn (4) 
L 
Selected Tankage (1) 
125.9 
352 
. 84 
5.20 
4 
Last 6 weeks, Corn (5) ; 
Selected Tankage (l)-* 
• • • 
.... .... ... 
. • • • 
6 
Corn (2); Shorts (1).. 
91.3 
327 
. 
5.31 
5 
* Note—Corn at lc per 
lb.; Barley at lc 
per lb; Selected Tankage at 
2c per lb. 
($40 
per ton); Fertilizer Tankage at UAc per lb. ($25 per ton); Wheat Shorts at l$4c per lb.; 
($25 per ton). 
Fertilizer Tankage With Corn 
This was our first trial of fertilizer Tankage, and we were led 
to it by the close similarity of appearance between the two grades of 
tankage, which made it difficult to distinguish between them bv cur¬ 
sory examination. The tankage used in this trial was some that had 
become wet and developed a stronger odor than selected tankage, and 
as a result the pigs did not eat quite so much corn and tankage as the 
lot on corn and selected tankage. The result is shown in a smaller gain. 
In spite of this, the cheaper cost of fertilizer tankage gave this lot 
first rank in producing cheap gain in live weight. Fertilizer tankage 
at this time was $21 per ton, while selected tankage was $35 per ton, 
f. o. b. Denver. The prices used in the table were round numbers 
