30 BULLETIN 48, HAWAII AGRICULTURAL EXPERIMENT STATIOX. 
In the earlier experiments " free-choice " feeding methods were 
practiced ; that is, the various kinds of feed were placed in separate 
compartments of the self-feeders so that the animals could select 
at will the kinds and quantities they desired. When they were 
pastured on alfalfa, cowpeas, peanuts, velvet beans, soy beans, and 
other leguminous crops, the hogs consumed comparatively little 
tankage or other animal protein feed, such as dried blood, dried 
milk, and the like. On the other hand, when they were pastured 
on nonleguminous crops, such as sweet potatoes, cassava, corn, and 
grasses, having a high carbohydrate content, over 10 per cent of the 
animal protein feeds was consumed. In all later feeding experi- 
ments mixtures were compounded in accordance with these findings. 
Hogs pasturing on leguminous forage crops were fed from self- 
feeders mixtures of dry mashes composed of corn meal, cassava 
meal, wheat, or rice bran and shorts, with tankage or blood meal not 
exceeding 2.5 per cent and cane molasses up to and including 5 
per cent. These rations had a nutritive ratio of 1 : 20. When the 
animals were pastured on such crops as sweet potatoes, cassava, 
Indian corn, Uba cane, and the like, the self-feeder rations were 
made up of alfalfa or pigeon pea meal, soy bean and peanut meal, 
oil-cake meal, mill run (bran and middlings), together with tankage, 
dried blood or dried skim milk to the amount of about 10 per- 
cent. This mixture produced a nutritive ratio of approximately 
1 : 3. The records of the Haiku substation show that the average 
consumption of these feeds per 100 pounds of hog was an average 
of 2^ to 3-J- pounds daily, and that 300 to 400 pounds of such feeds 
produced 100 pounds of gain in swine when the animals were pas- 
tured in accordance with the above outlined cropping schemes. 
The average daily gains ranged from 0.75 to 1.5 pounds per animal, 
depending mainly upon the age and condition of the animals fed. 
Enough data have been accumulated to show clearly that it pays 
to balance the feeding rations of swine, at least to the extent shown 
above, and that both forage crops and concentrated feeds must be 
carefully selected for palatability as well as for composition. 
The table on page 31 shows the forage crops that have been grown 
most successfully at the Haiku substation both from the standpoint 
of yield and from the standpoint of value to the hogs. 
