Report on the Agricultural Experiment Stations, 1953 Page: 66
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66 REPORT ON EXPERIMENT STATIONS, 1953
stacked loose, baled, or chopped contained similar amounts of these
vitamins. Examination of hay samples from ranches showed that the
first cutting of alfalfa lost 60 to 80 percent of the carotene and tocopherol.
The second cutting contained less of these compounds but losses
of the compounds through harvesting were less. The carotene content
of all samples met the dietary requirement for cattle and sheep.
Forage Crop Utilization
An increasing amount of research is being devoted to the nutritional
requirements of animals and to improved utilization of forage crops.
Such studies are of value to agronomists in their efforts to develop forage
crops of better quality, of greater feeding efficiency, and economical
Because weather conditions in Alaska in 1952 were more favorable
than normal, it was possible to produce good-quality bromegrass hay.
In feeding trials at the Alaska station (coop. USDA) dairy cows on
bromegrass hay produced as much milk as those fed bromegrass silage.
The silage was more efficient, however, as it took I acre to grow the hay
necessary for a cow to produce 1,235 pounds of milk in a 90-day period
and only 0.8 acre to produce the silage necessary for the same amount
The New York (Cornell) station compared early-cut and late-cut
grass silage with early-cut, barn-dried hay and late-cut, field-cured
hay as feed for dairy cows. It was found that the cows consumed more
of the early-cut silage and hay than the later-cut forage. Digestibility
ranged from 70 percent for very early forage down to less than 50
percent for late-cut hay. Early cutting reduced the yield of the first
cutting but the second cutting produced a high yield.
In a 2-week trial the Georgia station reports that dairy cows
produced 43 percent more 4-percent milk on temporary pasture than
cows on tall fescue pasture. The dry matter intake on the temporary
pasture of oats-ryegrass-crimson clover was 35 pounds per day, of
which 75 percent was digestible. Georgia dairy husbandmen have
been able to maintain 1,000-pound Guernsey cows producing 50
pounds of milk daily on oats-ryegrass-crimson clover pasture without
The Utah station (coop. USDA) grazed a dairy herd on a highyielding
irrigated pasture and reported that during a 2-year period
milk production averaged 12,803 pounds and butterfat 442 pounds.
This pasture yielded 5,173 pounds of total digestible nutrients per
acre per year and furnished 68.5 percent of the calculated total nutrient
requirement of the cows.
At the Kentucky station cows grazed for I month on a good bluegrass
pasture produced 94.4 percent as much milk as at the beginning
of the test. Cows on pure stands of bromegrass, orchardgrass, and
Kentucky 31 fescue averaged 93.3, 90.6, and 70.8 percent of their
The New Hampshire station (coop. USDA) investigated the changes
in composition of eight species of grasses during their growth. It was
found that crude fiber, cellulose, and lignin increase and that ether
extract, acid-soluble ash, and nitrogen decrease as the plants mature.
On the basis of percentage of the original content, the changes in nitrogen
and lignin are most striking.
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United States. Office of Experiment Stations. Report on the Agricultural Experiment Stations, 1953, book, 1953; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5989/m1/68/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.