IRRIGATED FIELD CROPS FOR HOG PASTURING. 
13 
and the lengths of the pasturing period varied greatly. In fact, 
the diversity was such that the results secured probably indicate 
approximately the limits within which the returns from this method 
of utilizing irrigated alfalfa will fall. A summary of certain fea- 
tures of the results secured is given in Table VIII. 
Table VIII. — Summary of determinations of gains, carrying capacity, and grain 
requirement made with ^ lots of pigs on irrigated alfalfa, pasture supple- 
mented with corn during the J/-ycar period from 19 IS to 1916, inclusive. 
Item of comparison. 
Scotts- 
bluff. 
Huntley. 
Belle 
Fourche. 
Coopera- 
tive 
tests. 
Total. 
17 
189 
1 
7 
51 
10 
59 
1 
3 
10 
596 
44 
895 
Gains per acre, for the season (15 double lots), double 
lots gaining between— 
1,456 and 2,000 pounds number. . 
2 001 and 2,500 pounds do 
2 
2 
5 
2J501 and 3,000 pounds do 
3,001 and 3,500 pounds do. . . . 
3,501 and 4,000 pounds do 
3 
2 
1 
3 
1 
3 
1 
4,001 and 4,292 pounds do 
1 
Gains per acre per day (34 lots), lots gaining— 
Less than 10 pounds do 
Between 10 and 20 pounds do 
Between 21 and 30 pounds do 
1 
7 
7 
2 
1 
12 
4 
2 
8 
6 
1 
1 
5 
2 
10 
22 
9 
More than 30 pounds do 
Average carrying capacity, pounds per acre (34 lots), 
lots carrying- 
Less than 2,000 pounds number . . 
Between 2,001 and 3,000 pounds do 
2 
1 
4 
2 
1 
2 
1 
2 
3 
7 
5 
23 
More than 3,000 pounds do 
Grain consumed per 100 pounds of gain (44 lots), lots 
consuming- 
Less than 200 pounds number. . 
200 to 250 pounds do 
251 to 300 pounds do 
301 to 350 pounds do 
6 
3 
4 
6 
2 
3 
1 
16 
16 
4 
1 
4 
5 
As shown in Table VIII, 30 lots of pigs were involved in full-season 
grazing; that is, 15 lots of pigs were used in pasturing alfalfa during 
the spring period, and the same number of lots were used in the sum- 
mer period. These are referred to in the table as 15 double lots. The 
other hogs were pastured for shorter periods. The table shows that 
the gains per acre for the season ranged from 1,456 to 4,292 pounds. 
Both these gains were made at Scottsbluff, the lowest with lots 2 and 
3, fed a 1 per cent ration of corn, and the highest with lots 16 and 17, 
fed a 3 per cent ration of corn. Of the 15 double lots, 5 gained from 
2,001 to 2,500 pounds per acre, 3 from 2,501 to 3,000 pounds, and 3 
from 3,001 to 3,500 pounds per acre. It is reasonable to expect that 
gains of about 2,500 pounds per acre of alfalfa can be made during 
the season if the supplementary corn ration is as high as 2 per cent. 
Variations in the gains will depend on the hogs, the supplementary 
ration, the crop, and the methods of management. 
Of the 34 lots furnishing data on the gains per acre, 22 lots gained 
from 10 to 20 pounds, and 9 gained from 21 to 30 pounds per acre 
