2,813 research outputs found
Asymptotic Dynamical Difference between the Nonlocal and Local Swift-Hohenberg Models
In this paper the difference in the asymptotic dynamics between the nonlocal
and local two-dimensional Swift-Hohenberg models is investigated. It is shown
that the bounds for the dimensions of the global attractors for the nonlocal
and local Swift-Hohenberg models differ by an absolute constant, which depends
only on the Rayleigh number, and upper and lower bounds of the kernel of the
nonlocal nonlinearity. Even when this kernel of the nonlocal operator is a
constant function, the dimension bounds of the global attractors still differ
by an absolute constant depending on the Rayleigh number.Comment: 13 pages, LaTex fil
ECONOMIC RETURNS FROM REDUCING POULTRY LITTER PHOSPHORUS WITH MICROBIAL PHYTASE
Requiring that crop applications of manure be based on phosphorus content (P-standard) could increase poultry litter disposal costs. Microbial phytase reduces litter P content and could reduce litter disposal costs under a P-standard. For a representative Virginia turkey farm, phytase costs 390 and reduce supplemental P feed costs by 3.81 per ton. Phytase net returns to the farm are an estimated $ 1,435.Economic returns, Microbial phytase, Nutrient management, Phosphorus, Poultry litter, Water quality, Livestock Production/Industries,
Dropping Pits
Dropping pits or roosting racks have become popular with the poultry raisers wherever they have been used. Many folks have replaced their roosts with dropping pits. People with old barns, hog houses or other buildings that have -been remodeled into a poultry laying house have asked for information on constructing dropping pits. Folks who have used the pit type roost cite the following advantages: Labor saving, Aids sanitation, Keeps the eggs cleaner, Helps to keep the litter dry, provides a good place for hens to rest, May save some eggs
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