TRRIGATED 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 1V.—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. 
Gain (pounds). 
Aver- | Area a can Grain 
Corn} Num-| “oye fF | Time S aie fed per 
Pigs. Time. ra- | ber of} . <2. _ || oO er | Per 100 
ey tion.| pigs. | Mmitial | pas- | test Total | acre. | pig | C2Pac- pounds 
weight.) ture. per ar er | ity per eas 
acre. | J & acre. | 01 Sain 
y. | day 
PP Che Lbs. | Acres.|Days Lbs. | Pounds. 
Reels.) Se Summer, 1914. .} 1.10 8 64| 0.25) 90|1,008| 111/035] 2,568 96 
TGR ps it Spring, 1915....| 1.00 3 108| .25| 60] 620| 10] .45] 2,040 215 
Mise Summer, 1915..| 1.00 9 33 25| 90] 836) 9] .30] 1,602 170 
Lots 2and3-.-| Allseason, 1915.| 1.00 |....--- |ss2sse0e 25 | 150 | 1,456 Os ees eva ees 189 
ae a ie Spring, 1913....| 2.30 5 109| .25| 61/1,524| 25 | 1.25/ 2,938 275 
rn a Summer, 1913..| 2.30 12 34 25 | 76|2,498| 32] .67| 2,862 209 
Lots4and5..| All season, 1913.| 2.30|....... (eae OR Ree || BD || OD oe ne 234 
jee eos Summer, 1914..| 2.06 10 59|  .25|  90|1,900| 21/ .53| 3,806 244 
7 1 ee ane aoee. 2. 64 ra 70| .25| 90|2,940| 33] 174] 47554 299 
Tribes. -: Spring, 1915....} 2.00 5 108.) .25| 601 1,244{ 20/1 2,782 276 
fy; eo Summer, 1915..| 2.00] 12 31| 125] 90/1,732| 19] .40] 2) 454 200 
Lots8and9--; All season,1915.| 2.00 ;.......|.--.---- -25 | 150 | 2,976 1G ee aesleaoe ack: 253 
Hani 25: Spring, 1915... .| 2.00 5|  108| .25|  60|1,180| 20/1 2, 754 274 
Tori... Summer, 1915..| 2.00] 12 34| .25! 9011,580| 18] .38] 27406 226 
Lots10and11| Allseason, 1915.) 2.00 |.......|--.-..-- .25 | 150 | 2,760 iI) aps eee 246 
sb Spring, 1916....| 2. 26 6 83| .25| 60|1,440| 24/1 2,724 235 
Tap isis. Summer, 1916..| 2.00} 10 45| .25| 82|1,788| 22] .55| 2,678 224 
Lots12and 13) Allseason, 1916.|......|....-..|-------- | .25 | 142 | 3,228 PAIN ers sel SA Ce ate 228 
Uh Spring, 1916....] 2. 26 20 74| 1 60 |1,147| 19| .95| 2,054 247 
arth... Summer, 1916..| 2.70] 40 30 | 1 97|1,995| 22] .55| 2,189 289 
Lots14and15| Allseason, 1916.|......|.......|... SY eal eos Wome ee 274 
Tot ib....... | Spring, 1915....| 3.00 6| 108| .25| 60|1,772| 30|1.25| 3,478 321 
Tati? .-.03.: Summer, 1915..| 3.00 15 33| .25| 90|2)520| 28] .47| 3,244 256 
Lots16and 17 Allseason, 1915.| 3.00 |.......].....:.- | Meouliaaoy scons P28 lke. lol kee 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 
