IRRIGATED FIELD CROPS FOR HOG PASTURING. 15 
lots having average initial weights between 51 and 100 pounds. The 
average daily gains of these 11 lots ranged from 0.35 to 1 pound per 
pig, all but one, which received a 1 per cent corn ration, averaging 
more than 0.50 pound per pig. The 15 lots with average initial 
weights between 101 and 150 pounds made average daily gains be- 
tween 0.45 pound (a lot receiving a 1 per cent ration of corn) and 
2.21 pounds. Of these 15 lots, 13 averaged 0.75 pound or more gain 
per day per pig. 
PASTURING ALFALFA SUPPLEMENTED WITH BARLEY. 
In many irrigated districts barley is extensively used to supplement 
alfalfa pasture for hogs. In certain districts having short growing 
seasons corn production is somewhat hazardous, particularly in the 
absence of satisfactory corn varieties. In such places barley is com- 
monly the leading grain feed for hogs. Table IX shows the results 
obtained with 15 lots of pigs on alfalfa pasture supplemented with 
barley. In practically all these tests rolled barley was used, and 
about a 2 per cent ration was fed. In general, the same methods of 
pasturing were used as those described for the tests in which corn was 
the grain supplement. 
As shown in Table IX, there were 6 instances in which alfalfa was 
pastured for approximately a full season, the length of the pasture 
period ranging from 125 to 190 days. The gains per acre in these 
instances ranged from 1,912 to 2,788 pounds, both this minimum and 
this maximum being gained at the Truckee- Carson Experiment Farm 
with a 2 per cent ration of barley. These results show the effect of 
differences in the character of the alfalfa pasture and in the pigs 
used. 
Data on carrying capacity are furnished by 14 lots. The average 
carrying capacity in these 14 lots ranged from 1,075 to 3,114 pounds 
per acre. One of the two instances in which the lower carrying 
capacity was obtained was at the Truckee-Carson Experiment Farm 
in the fall of the year 1916, and the other was in the summer of 1917 
at the Yuma Experiment Farm where, as previously stated, alfalfa 
has a period of slow growth in the hottest part of the summer. In 
8 of the 14 instances considered in Table IX, the carrying capacity 
was above 2,000 pounds per acre. A gain of 2,500 pounds per acre 
can reasonably be expected from good alfalfa pasture supplemented 
with as much as a 2 per cent ration of barley ; but, as in the case of 
corn, the gains will vary widely with differences in the hogs, the pas- 
ture, and the methods of management. 
Eliminating lot 13, which was pastured for only 14 days, the grain 
requirement of the lots considered in Table IX ranged from 214 to 
334 pounds per 100 pounds of gain. One half the lots consumed 300 
