D 
RESULTS OF SOFT-PORK INVESTIGATIONS, II 43 
Rice polish and tankage self-fed free choice on oat or rye pasture or in dry 
lot to pigs starting at weights under 100 pounds and making gains of 35 pounds 
or more through a period of from five to eight weeks will 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 previously made on the 
rice polish ration. 
After the release of the above-quoted statement additional experi- 
ments were completed. With the availability of the additional results 
and for the purpose of a more accurate summarizing statement of 
the results just presented it is believed that the initial- weight limits 
should be specified as 50 and 114 pounds and the feeding period as 
approximately eight weeks. 
HARDENING RESULTS FROM BREWERS' RICE WITH PROTEIN SUPPLEMENTS 
As described in Department Bulletin 1407 (4) brewers' rice is 
another of the by-products of rice milling, but unlike rice polish and 
rice bran it is extremely low in fat. It is an excellent hog feed and 
has been shown to produce much firmer fat than that produced by 
corn. It is at once apparent that it should be a very suitable 
hardening feed for use subsequently to a softening feed. 
Experiments on the use of brewers' rice following the feeding of 
rice polish have paralleled those on corn just described. In all 
experiments tankage and minerals were fed with rice polish during 
the softening period and with brewers' rice during the hardening 
period. These feeds were self-fed, free choice. Further details of 
the feeding plans of the several experiments follow : 
Arkansas, 1925, both periods in dry lot for 56 days each. 
Arkansas, 1926, both periods in dry lot for 56 days each. 
Iberia, 1923, both periods on oat pasture for 56 days each ; additional daily 
supplement of 3.14 pounds of skim milk per animal. 
Iberia, 1924, same as Iberia, 1923. 
Iberia, 1926, both periods in dry lot for 56 days each ; additional daily sup- 
plement of 3.14 pounds of skim milk per animal. 
The results of these experiments are given in Table 22. In many 
respects variations in initial firmness and in gains are comparable to 
those discussed in connection with Table 21. The fat content of the 
rice polish used in four of the lots fell within the range of from 12.4 
to 14 per cent. There was an extremely wide range in the firmness 
of the hogs at the start of the softening period. The Iberia farm 
pigs in 1923 and 1926 received brewers' rice as the basal feed prior 
to the experiment, and consequently the check pigs show a very 
low refractive index. In the 1923 experiment data on 10 hogs 
killed at the close of the rice-polish period showed an average grade 
of medium soft and a refractive index of 1.4604. This indicates that 
less softening developed in these hogs than usually results under more 
average conditions. Besides the greater initial firmness, the high 
gain (81 pounds) on rice polish had carried these hogs well past the 
stage of maximum softness and so made possible the development of 
a higher degree of firmne 
compared to the other lots. 
