2,271 research outputs found
Ground Flax and other Protein Supplements with Corn for Fattening Calves and Pigs
This bulletin includes the results of an experiment in feeding supplements with corn to calves and pigs for the purpose of fattening
Rye as a Fattening Feed for Cattle and Swine in South Dakota
The growing of rye as a grain crop is practiced quite generally throughout South Dakota. Statistics issued by the State Department of Agriculture at Pierre show that there were over one-eighth as many acres of rye as wheat grown in 1930. About one-fifth of the total acreage is credited to the counties in the North Central and the Northeastern districts in the East River section, while the largest county acreage is credited to Tripp county in the South Central-district in the West River country. All counties with the exception of two are credited with rye acreage. Corn and barley are the principal feeds grown in the State for fattening both cattle and swine. Feeding rye to livestock under ordinary conditions is not practiced to any great extent because the price as a rule is too high when compared with the prices of corn and barley. Conditions sometimes arise, however, which make it advisable to use rye for feeding purposes. The widespread cultivation of rye over the state, the inaccessibility of markets in many cases, and the relatively low market value during the last three years probably are the principal factors responsible for the increased inquiry as to the suitability of this grain as a feed for fattening livestock. In Henry and Morrison\u27s tables of digestibility of grains we find that in composition, rye resembles wheat and barley more than it does corn, although practically the same in digestible nutrients as corn. From these data corn has from three to four times as much digestible fat as rye, while barley and rye both have more digestible crude protein than corn. Perchance these differences in composition were the principal causes of difficulties experienced in feeding rye both whole and ground as the sole grain rations
Response of Plant Water Potential to the Irrigated Environment of Southern Idaho
Laboratory studies have shown that plant water potential
affects a number of key processes involved in
growth, but there has been almost no information on
what levels of water potential occur under irrigated conditions
in the field. Before assessing the practical implication
of laboratory results on soil and crop management,
this type of information must be available. Consequently,
plant water potential in irrigated crops of
Zea mays, Triticum aestivum, Hordeum vulgaris, Phaseolus
vulgaris, Pisum sativum, Solanum tuberosum, Beta
vulgaris, and Medicago sativa, L. was measured throughout
the growing season in southern Idaho. Soil moisture
conditions and potential evapotranspiration were monitored.
Daily changes in plant water potential varied from
less than 5 bars to more than 20 bars, while random sampling
of supposedly homogeneous sets of plants showed
an average variation of about 2 bars. Changes due to
differences in soil moisture were also detected, even
though the soil moisture potential was kept high enough
for near-optimum crop production. Though the crops
differed widely in their response to changes in environment,
the plant water potential was strongly affected by
microclimatic conditions. Day-to-day changes in plant
water potential generally correlated more closely with
changes in potential evapotranspiration than with
changes in soil moisture content. Many of the daily
changes observed in the plants remain unexplained, however.
In general, the average water potential levels of all
the field-grown plants were lower than levels reported
from growth chamber studies. Potentials seldom rose
above —8 bars and were never observed above —5 bars
Methods of Feeding and Grain Rations for Fattening Lambs
This bulletin gives the results of an experiment extending over a period of three years on the methods of feeding and the grain rations for fattening lambs
Value of Grinding Grains and Roughages for Livestock
This experiment was conducted in cooperation with the departments of Agricultural Engineering, Animal Husbandry and Dairy Husbandry of South Dakota State College. The department of Agricultural Engineering ground the grains and roughages with a burr grinder. For power a tractor was used, such as is found on any farm where grinding is practiced. The departments of Animal Husbandry and Dairy Husbandry fed these ground grains and roughages to livestock of the different kinds. There has been for some time, and there is today a demand for information along these lines because some farmers who have purchased tractors to assist with the farm work are eager to utilize this machinery to the best advantage during the idle period. Naturally, the question of grinding all the roughages and grains grown on the farm before feeding to all kinds of livestock is suggested. This experiment did not include all of the grains and roughages but only some of those that are more commonly grown in the state. We know there are feeds that would be more palatable for some livestock if ground than unground. Palatability is an important factor in all feeding operations. The practice of mixing ground grains and roughages at the time of grinding has been advocated by some; because of this we fed the ground feeds mixed, as well as in separate troughs, to learn whether there was any great advantage in feeding in this manner. Therefore, this bulletin not only includes the advantages and disadvantages of feeding ground grains and ground roughages, as such, in separate troughs but the advantages and disadvantages of feeding the ground feeds mixed. There are more mixed feeds for sale at the present time than ever before. In some cases feeds are mixed while being ground, but in our mixing we aimed to mix the same quantity of each as animals were consuming when the ground feeds were fed in separate troughs. It required time to mix these feeds daily but in figuring the cost of producing 100 pounds of gain we have not included anything for this chore
Quenching time-scales of galaxies in the EAGLE simulations
Large scale structure and cosmolog
Amplitude measurements of Faraday waves
A light reflection technique is used to measure quantitatively the surface
elevation of Faraday waves. The performed measurements cover a wide parameter
range of driving frequencies and sample viscosities. In the capillary wave
regime the bifurcation diagrams exhibit a frequency independent scaling
proportional to the wavelength. We also provide numerical simulations of the
full Navier-Stokes equations, which are in quantitative agreement up to
supercritical drive amplitudes of 20%. The validity of an existing perturbation
analysis is found to be limited to 2.5% overcriticaly.Comment: 7 figure
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