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Full-Text Articles in Life Sciences
Ammonia And Hydrogen Sulfide Flux From Beef Cattle Pens: Implications For Air Quality Measurement Methodologies And Evaluation Of Emission Controls, Jacek A. Koziel, David B. Parker, Bok-Haeng Baek, Kevin J. Bush, Marty Rhoades, Zena Perschbacher-Buser
Ammonia And Hydrogen Sulfide Flux From Beef Cattle Pens: Implications For Air Quality Measurement Methodologies And Evaluation Of Emission Controls, Jacek A. Koziel, David B. Parker, Bok-Haeng Baek, Kevin J. Bush, Marty Rhoades, Zena Perschbacher-Buser
Jacek A. Koziel
Ammonia (NH 3 ) and hydrogen sulfide (H 2 S) are emitted from beef cattle feedlots with NH 3 being greater by nearly three orders of magnitude. Nearly 30% of the U.S. beef cattle are fed in the High Plains of Texas. Earlier research indicates that abatement technologies may be needed to significantly reduce NH 3 emissions. To date, little is known about the appropriate measurement methods to evaluate the effectiveness of NH 3 emission controls. In this research, we determined the (a) variability of NH 3 and H 2 S fluxes within a single pen and (b) the relationships …
Comparison Of The Efficiency And Accuracy Of Three Estrous Detection Methods To Indicate Ovulation In Beef Cattle, George A. Perry
Comparison Of The Efficiency And Accuracy Of Three Estrous Detection Methods To Indicate Ovulation In Beef Cattle, George A. Perry
South Dakota Beef Report, 2005
The ability to successfully artificially inseminate cattle requires determining the appropriate time to inseminate. Therefore, detection of standing estrus is a major factor in the success or failure of most artificial insemination programs. The objective of these experiments was to determine the efficiency and accuracy of three estrous detection methods (visual, penile deviated bull, and Estrus Alert estrous detection aids) to determine if animals were going to ovulate. Fifty-three postpartum beef cows were synchronized with an injection of gonadotropin releasing hormone (GnRH) followed by an injection of prostaglandin F2_ (PG) seven days later. Estrus was monitored for 72 hours following …