RESULTS OF SOFT-POEK INVESTIGATIONS, II 49 
produce, in the usual case, carcasses of a satisfactory degree of firm- 
ness when a subsequent gain in weight of 125 pounds or more has 
been made by the pigs on corn with tankage. 
(6) Soy beans fed as a supplement to corn in dry lot in the ratio 
of 1 pound of soy beans to 3 pounds of shelled corn to pigs ranging 
up to 130 pounds in starting weights will not produce firm carcasses 
in the usual case when the hogs are slaughtered after a gain of 
approximately 100 pounds or more has been made on the corn-soy- 
bean ration. 
(T) Rice bran and tankage self-fed free choice on rye pasture or 
in dry lot and with or without a supplement of 5 pounds or less of 
skim milk per animal daily to pigs starting at weights under 100 
pounds and making gains up to 100 230unds through a feeding period 
of from 8 to 16 weeks produce soft carcasses. 
(8) Rice bran with tankage followed by corn with tankage fed to 
pigs with initial weights of from 50 to 114 pounds through equal 
feeding periods of eight weeks each has not produced uniformly firm 
carcasses. The wide distribution in the gradings of the carcasses, 
even though the average gain of the hogs on hardening feed was 
over twice that on softening feed, is attributed to a number of factors. 
Among these factors were previous feeding, fat content of the rice 
bran, rate of gain, and relative gains on softening and hardening 
feeds. 
(9) The hardening effects of corn and of brewers' rice fed subse- 
quently to rice polish were determined on pigs with initial weights 
ranging from 50 to 114 pounds. In the case of the first -named feed 
it has been concluded that rice polish and tankage self -fed, free choice, 
on oat or rye pasture or in dry lot to pigs starting at weights of 50 
to 114 pounds and making gains of 35 pounds or more through a 
period of approximately eight weeks do not produce firm carcasses 
in the usual case, even though a subsequent gain in weight has been 
made by the pigs on corn with tankage equal to that made on the rice- 
polish ration. In fact, the general average on 75 hogs shows that a 
gain on the corn ration of 1.79 times that on the rice-polish ration 
resulted in an average grading of medium soft. 
On the other hand, brewers' rice fed in place of corn, other condi- 
tions being equal, has produced firm carcasses when the gain on the 
brewers' rice ration was twice that on rice polish. 
LITERATURE CITED 
(1) Dvorachek, H. E., and Sandhouse, H. A. 
1918. soft pork fsom rice bran. Ark. Agr. Expt. Sta. Bui. 142, 8 p. 
(2) Ellis, N. R., and Isbell, H. S. 
1926. SOFT-PORK STUDIES. II. THE INFLUENCE OF THE CHARACTER OF THE 
RATION UPON THE COMPOSITION OF THE BODY FAT OF HOGS. J0U1\ 
Biol. Cliem. 69 : 219-238, illus. 
(3) and Isbell, H. S. 
1926. SOFT-PORK STUDIES. III. THE EFFECT OF FOOD FAT UPON BODY FAT, AS 
SHOWN BY THE SEPARATION OF THE INDIVIDUAL FATTY ACIDS OF 
the body fat. Jour. Biol. Chern. 69 : 239-248. 
(4) Hankins, O. G., and Ellis, N. R. 
1926. SOME RESULTS OF SOFT-PORK INVESTIGATIONS. U. S. Dept. Agl\ Bui, 
1407, 68 p., illus. 
