Experiment Station Record, Volume 92, January-June, 1945 Page: 99
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1945] ANIMAL PRODUCTION 99
trate. The differences in combined winter and summer gains between the two
systems were not significant. The study was conducted with four lots of cattle
consisting of seven steers and three spayed heifers each, fed from December 12,
1940, to May 1, 1942, with two lots wintered in dry lot and two on range.
Gains made by cattle on summer range in northern Utah, L. A. STODDART
(Utah Sta. Bul. 314 (1944), pp. 24-, ills. 6).-Continuing the study of Utah
range plants (E. S. R., 89, p. 410), the average summer gain of Utah steers (and 14
heifers in 1943) was found to be 29.03 percent of the initial weight, which ranged
from 300 to 800 lb., averaging 576.8 lb. in the 8 yr. 1934-37 and 1940-43. The
cattle gains from month to month and year to year varied but averaged 1.57 lb. per
head per day over the entire period. Poor gains may result from unfavorable
weather conditions and the cessation of normal grazing activity. The size of the
steers influenced, gains; the large steers, usually older, gained significantly less in
the late summer than smaller animals, but pounds gained per head over the season
did not differ significantly. The smaller animals were considered more efficient
in converting forage to meat than the larger animals. The most economical marketing
practice depends on the condition of the cattle and range and the market trends.
Dairy-breed heifers and steers were found to gain much less efficiently than Herefords.
Because of the high P content of the forage and because gains did not
increase with P supplement, additions of P to the ration did not seem necessary
despite rather low P levels of the grasses in late summer.
Growth of steers on seleniferous range, A. L. MoxoN, M. A. RHIAN, H. D.
ANDERSON, and 0. E. OLSON. (S. Dak. Expt. Sta.). (Jour. Anim. Sci., 3 (1944),
No. 3, pp. 299-309, illus. 2).-Four lots of 10 steers each were established on a
highly seleniferous range to study the effects of undergrazed range, overgrazed
range, and of normal range with and without arsenic added to the salt mixture at
the rate of 5, 10, and 25 p. p. m. The steers, about 1 yr. of age, were half from
seleniferous and half from nonseleniferous areas and averaged about 475 lb. at the
start. All four lots made good summer gains, averaging 96, 109, 97, and 109 lb.,
respectively, from June 21 to September 21, 1939, with 100, 300, and 2001 acres of
range with and without arsenic in the salt mixture. All steers remained more or
less stationary in the winter, making little gains. The average gains in the second
year from May 21 to August 21' were, respecitvely, 222, 235, 254, and 248 lb. The
best gains were made by the steers receiving 25 p. p. m. of arsenic in the salt. Any
symptoms of selenium poisoning were reduced, although symptoms of this appeared
each summer or fall about the time the grass began to dry up. Lameness and
cracked hoofs were prevalent in all the lots, but did not appear after arsenic in the
salt was increased from 10 to 25 p. p. m. The selenium content of the tissues and
organs was ascertained at the time of slaughter.
Carcasses of cattle in feeding experiments show low grain ration made good
beef, W. E. CONNELL and R. C. TOM (Colo. Farm Bul. [Colorado Sta.], 6 (1944),
No. 4. pp. 6-9, lltus. 1).-Good to Choice beef was produced by feeding steers only
a small amount of grain with Colorado roughages and alfalfa hay but no protein
supplement. The most economical gains were made by steers receiving a small
amount of grain plus beet byproducts, as reported for the previous year's results
(E. S. R., 90, p. 237). The studies were conducted with 8 lots of about 9 steers
each, fed for 140 days on rations of rolled barley alone or with equal parts of
ground corn and alfalfa hay. The different lots received for comparison wet beet
pulp, alfalfa silage, beet top silage, corn silage, or dried beet tops. The carcasses all
graded Good or Choice.
Cull peas for fattening calves, H. G. MCDONALD and M. E. ENSMJNGER
(Washington Sta. Bul. 439 (1944), pp. 16, illus. 4).-A mixture of peas, barley, and
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/112/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.