Experiment Station Record, Volume 57, July-December, 1927 Page: 74
xvii, 1002 p. ; ill. ; 24 cm.View a full description of this book.
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74 EXPERIMENT STATION RECORD [Vol. 57
were taken for butterfat tests, and the cream from the separator was made
into unsalted, uncolored butter.
The cows ate on an average 27.2 lbs. per head more okra than they did
chopped sorghum and produced about 3 lbs. more milk per day. This increase
in milk production was probably partly due to increased feed consumption.
No difference was noted during the 2 periods in the color, flavor, odor, or
appearance of the milk produced.
The butter produced from a cream during the okra-feeding period had a
somewhat lower iodine number and a higher Reichert-Meissl number than that
made from cream produced during the sorghum-feeding period. The okra butter
apparently had a somewhat higher melting point. Both samples appeared
normal in color, odor, flavor, and texture. Chemical tests showed no evidence
of pectins or other mucilaginous carbohydrates in the okra butter.
Dried brewers' yeast vs. linseed oilmeal as a protein supplement for
dairy cows in milk, H. BARTON, A. R. NESS, and E. W. CRAMPTON (Macdonald
Col., McGill Univ., Tech. Bul. 3 (1926), pp. 30).-Two trials to compare the
relative values of dried brewers' yeast and linseed oil meal are reported.
The first of these trials was for three 21-day periods. The second trial consisted
of three 30-day periods. The double reversal system was used in both
trials, with 7- and 10-day preliminary feeding periods. The ration consisted
of grain, silage, hay, and either dried brewers' yeast or linseed oil meal.
Daily records were kept of milk production, and a butterfat test was taken
once during each period.
In the first trial the cows on dried brewers' yeast produced 4.13.45 lbs.
of milk more than those on linseed oil meal. However, a difference of 10.94
lbs. was required to make the results significant. In the second trial the
difference was 76.05 lbs., with a requirement of 22.18 lbs. for significance.
From these data, the authors concluded that dried brewers' yeast may be
substituted pound for pound for linseed oil meal in rations for milking cows.
The suggestion is made that the brewers' yeast be incorporated with the
brewers' grains and sold in that form. Such a practice would materially increase
the value of the grains. Appendixes give detailed data concerning the
individual cows in the experiment.
Exercise as a factor in digestion trials with dairy cows, H. B. ELLENBERGER
and B. H. SCHNEIDER (Vermont Sta. Bul. 262 (1927), pp. 12).-The
average results of 16 digestion trials show slightly lower coefficients of digestibility
for all nutrients except nitrogen-free extract by the milking cow when
no exercise is given during the trial than when moderate exercise is allowed.
The difference is small and may be considered of minor importance.
Milk goat improvement, 0. C. CUNNINGHAM (New Meoico Sta. Bul. 154
(1926), pp. 42, figs. 40).-The results of grading up native milk goats by the
use of a purebred sire of the Toggenburg breed are described. Some of the
rations used successfully for milk goats at this station are given. A brief comparison
of goat's and cow's milk and a short description of the leading milk
breeds are included. Pictures of the native does and their offspring are
appended.
Some variations of the heat method for sterilizing milking machines,
L. H. BURGWALD (Jour. Agr. Research (U. S.], 34 (1927), No. 1, pp. 27-33).In
order to prolong the life of the rubber parts of milking machines and at the
same time get good results bacteriologically, the work previously noted (E. S.
R., 54, p. 376) was continued. Three single units were used in this test. Immediately
after milking each unit was rinsed by drawing clean, cold water through
by vacuum, washed with a brush in hot water (110 to 120 F.) containing wash
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United States. Office of Experiment Stations. Experiment Station Record, Volume 57, July-December, 1927, book, 1928; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc5099/m1/91/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.