IRRIGATED FIELD CROPS FOR HOG PASTURING. 9 
spring pigs were pastured on the same land during the summer 
periods, from about July 1 to the end of the growing season in Sep- 
tember. Each pasture was divided into two parts, which were pas- 
tured alternately, one part being grazed while the other was irrigated 
and the alfalfa on it allowed to produce new growth. The pigs had 
access most of the time to salt, slack coal, and rock phosphate and 
were given the care which is usually necessary in successful swine 
feeding. A lot of 5 hogs on alfalfa pasture in an experiment at 
Scottsbluff is shown in figure 2. The results secured with these 17 
lots of pigs are summarized in Table IV. 
Table IV. — Results secured with 17 lots of pigs on irrigated alfalfa pasture sup- 
plemented with corn on the Scottsbluff Experiment Farm during the 4-year 
period from 1913 to 1916. 
lime. 
Corn 
ra- 
tion. 
Num- 
ber of 
pigs. 
Aver- 
age 
initial 
weight. 
Area 
of 
pas- 
ture. 
Time 
of 
test. 
Gain (pounds). 
Aver- 
Grain 
Pigs. 
Total 
per 
acre. 
Per 
acre 
per 
day. 
Per 
Pig 
per 
day. 
age car- 
rying 
capac- 
ity per 
acre. 
fed per 
100 
pounds 
of gain. 
Lot 1 
Summer, 1914 . . 
Spring, 1915 
Summer, 1915.. 
All season, 1915. 
Spring, 1913.... 
Summer, 1913.. 
All season, 1913. 
Summer, 1914 . . 
do 
Spring, 1915 
Summer, 1915.. 
All season, 1915. 
Spring, 1915.... 
Summer, 1915.. 
All season, 1915. 
Spring, 1916 
Summer, 1916.. 
All season, 1916. 
P.ct. 
1.10 
8 
Lbs. 
64 
Acres. 
0.25 
Days. 
90 
1,008 
11 
0.35 
Lbs. 
2,568 
Pounds. 
196 
Lot2 
Lot3 
1.00 
1.00 
3 
9 
108 
33 
.25 
.25 
60 
90 
620 
836 
10 
9 
.45 
.30 
2,040 
1,602 
215 
170 
1.00 
.25 
150 
1,456 
9 
189 
Lot 4 
Lot 5 
2.30 
2.30 
5 
12 
109 
34 
.25 
.25 
61 
76 
1,524 
2,428 
25 
32 
1.25 
.67 
2,938 
2,862 
275 
209 
2.30 
.25 
137 
3,952 
29 
234 
Lot6 
Lot 7 
2.06 
2.64 
10 
11 
59 
70 
.25 
.25 
90 
90 
1,900 
2,940 
21 
33 
.53 
.74 
3,806 
4,554 
244 
299 
Lot8 
Lot9 
2.00 
2.00 
5 
12 
108 
31 
.25 
.25 
60 
90 
1,244 
1,732 
20 
19 
1 
.40 
2,782 
2,454 
276 
200 
Lots 8 and 9. . 
2.00 
.25 
150 
2,976 
19 
253 
LotlO 
Lot 11 
2.00 
2.00 
5 
12 
108 
34 
.25 
.25 
60 
90 
1,180 
1,580 
20 
18 
1 
.38 
2,754 
2,406 
274 
226 
LotslOandll 
2.00 
.25 
150 
2,760 
19 
246 
Lot 12 
Lotl3 
2.26 
2.00 
6 
10 
83 
45 
.25 
.25 
60 
82 
1,440 
1,788 
24 
22 
1 
.55 
2,724 
2,678 
235 
224 
Lots 12 and 13 
.25 
142 
3,228 
23 
228 
Spring, 1916 
Summer, 1916.. 
All season, 1916. 
Lot 14 
Lot 15 
2.26 
2.70 
20 
40 
74 
30 
1 
1 
60 
97 
1,147 
1,995 
19 
22 
.95 
.55 
2,054 
2,189 
247 
289 
Lots 14 and 15 
1 
157 
3,142 
20 
274 
Spring, 1915 
Summer, 1915.. 
All season, 1915. 
Lotl6 
Lot 17 
3.00 
3.00 
6 
15 
108 
33 
.25 
.25 
60 
90 
1,772 
2,520 
30 
28 
1.25 
.47 
3,478 
3,244 
321 
256 
Lots 16 and 17 
3.00 
.25 
150 
4,292 
28 
283 
The data shown in Table IV were secured with 189 pigs in 17 lots, 
of which 7 contained a total of 50 fall-farrowed pigs, and 10 a total of 
139 spring-farrowed pigs. The gains per acre of alfalfa ranged 
from 9 to 33 pounds per day; the average carrying capacity varied 
86508°— 19— Bull. 752 2 
