IRKIGATED FIELD CROPS FOR HOG PASTURING. 27 
21 of the 23 containing less than 1 acre each. In average initial 
weight, the pigs used ranged from 51 to 152 pounds, but 18 of the 23 
lots averaged 80 pounds or more per pig. Seven of the lots averaged 
100 pounds or more per pig. The length of the hogging period 
ranged from 10 to 77 days, about half being between 20 and 30 days. 
The gains per acre varied widely, of course, because of the variations 
in the yield of corn and the character of the hogs used. The range 
in gain per acre was from 183 to 1,048 pounds. The gains per acre 
per day depend chiefly on the yield of corn and the number of hogs 
per acre, but they are influenced also by the size and thriftiness of the 
hogs. The animals all made fairly rapid gains, as would be expected 
of hogs having free access to cornfields. 
The yield estimates for lots 1 to 21, inclusive, were made in one of 
two ways. In some cases the yield of the hogged plat was assumed 
to equal the average yield of several other plats in the same field 
with the same cultural treatment. In the other instances the yield 
of 100 stalks systematically selected in the quarter-acre or half -acre 
plat was actually determined, and the average yield per stalk so de- 
termined was multiplied by the total number of stalks on the plat. 
These two methods of estimating probably gave results which were 
within 10 per cent of the actual yields, but the figures should be re- 
garded merely as approximations. The yield estimates in lots 22 and 
23 mere made by the farmers owning the fields. 
On the basis of these estimates, the corn consumed per 100 pounds 
of gain ranged from 324 pounds (5.8 bushels), in lot 11 at the Hunt- 
ley Experiment Farm, to 750 pounds (13.4 bushels), in lot 20 at the 
Belle Fourche Experiment Farm. In only 5 out of the 21 cases for 
which estimates were made did the corn consumed equal or exceed 
500 pounds per 100 pounds of gain; and in only four cases was it less 
than 400 pounds. The average for the 12 lots consuming between 400 
and 500 pounds of corn per 100 pounds of gain was about 450 pounds, 
or 8 bushels. This probably is a fair approximation of what should 
be expected when hogs weighing 75 to 125 pounds are used to hog off 
the corn without supplementary feed. 
Hogging com with supplementary feed. — The supplements used 
in, the corn-hogging tests considered here include tankage, alfalfa 
pasture, rape, and the aftermath in alfalfa and grain fields. Data 
from 14 lots are available and are summarized in Table XVIII. 
These lots were distributed as follows: 
Lots 1, 2, 3, 4, 7, 8, 9, and 10 at the Scottsbluff Experiment Farm. 
Lots 5 and 6 on a small farm on the Tieton Reclamation Project. 
Lot 11 on the North Platte Reclamation Project. 
Lot 12 on the Huntley Reclamation Project. 
Lot 13 on the Huntley Experiment Farm. 
Lot 14 on the Boise Reclamation Project. 
