IRRIGATED FIELD CROPS FOR HOG PASTURING. 33 
ent available, the crop is to be regarded as in the experimental stage, 
and attempts to grow it for hogging-off purposes should be made 
conservatively. 
GRAIN SORGHUMS. 
Although certain of the grain sorghums are hogged off in the irri- 
gated sections of the Southwest, there are but few experimental data 
regarding the practice. The high value of one of the grain sorghums 
(milo) as a supplement to alfalfa pasture for hogs already has been 
pointed out, but only fragmentary evidence is available regarding the 
practice of hogging off the crop. 
In 1916 at the Yuma Field Station, 12 hogs with an average initial 
weight of 170 pounds were pastured on a half-acre field of milo for 
21 days, at the same time having access to a small patch of alfalfa 
pasture. The hogs gained at the rate of 0.90 pound per day each, or 
25 pounds per acre per day. The total gain per acre of milo for the 
period was 518 pounds. The milo yield was estimated as 1,874 
pounds per acre, so that the estimated grain requirement per hun- 
dred pounds of gain was 342 pounds. In 1917 another lot of 12 pigs, 
weighing 113 pounds each, was pastured on an 0.83-acre field of milo 
for 14 days. They had access to alfalfa pasture, but made little use 
of it. They gained 25 pounds per acre per day, or 1.76 pounds per 
hog per day, and the total gain per acre of milo was 355 pounds. The 
superintendent of the Yuma Field Station reports that much of the 
grain was trampled into the soft soil and lost. It is generally be- 
lieved that much of the feeding value of sorghum grain is lost when 
the grain is fed without grinding. These two tests furnished no 
evidence on this point. There is need for further experimentation 
in connection with hogging off grain-sorghum crops, as a number of 
important problems regarding the practice remain to be solved. 
PUBLICATIONS ON SWINE PRODUCTION. 
A list of publications issued by the Department of Agriculture con- 
taining useful information and suggestions of interest to swine pro- 
ducers on irrigated lands in the western United States is given be- 
low. Those of which the price is not stated can be obtained without 
charge upon application to the Secretary of Agriculture; the others 
may be obtained by remitting the price specified to the Superintend- 
ent of Documents, Government Printing Office, Washington, D. C. 
As this paper discusses only one phase of swine production on irri- 
gated lands, it is suggested that the reader consult one or more of 
the publications mentioned below and also publications of the State 
experiment stations for information regarding other features of the 
industry. 
