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Browsing by Author "Caswell, Larry Forrest"

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    The effect of processing method of broiler litter on pasteurization, nitrogen loss and nitrogen utilization by sheep
    Caswell, Larry Forrest (Virginia Polytechnic Institute and State University, 1972)
    Various broiler litter processing methods were evaluated. Treatments effective for litter pasteurization were dry heating at a depth of 0.63 cm for 20 min; autoclaving for 10 min. or longer; dry heating following the addition of 1 to 4 g of paraformaldehyde (PFA) per 100 g of litter at depths of 0.63 and 2.54 cm; and ethylene oxide (ETO) fumigation for 30 min. or longer. Moisture and uric acid nitrogen were lowered (P < .01) for dry heat and the PFA processes. Autoclaving and PFA addition followed by dry heating lowered (P < .01) NPN. Ammonia nitrogen was reduced (P < .01) by all pasteurizing treatments except autoclaving for 10 min. A metabolism trial was conducted with sheep. Litter pasteurized by dry heating at a depth of 0.63 cm for 20 min., dry heating at a depth of 2.54 cm after the addition of 2 g of PFA per 100 g of litter or fumigation with ETO at a depth of 15.24 cm for 60 min. supplied 50% of the nitrogen in the respective rations. Processing method had no significant effect on nitrogen utilization and apparent digestion coefficients. Ruminal ammonia nitrogen was higher (P < .05) for the dry heat than for the ETO treatment. Acetic acid and total VFA's, expressed as µ mole/ml were higher (P < .05) for the PFA than the dry heat treatment. Expressed as moles/100 moles, propionic was higher (P < .05) for the ETO than for the PFA treatment.
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    Fermentation, utilization and palatability of broiler litter ensiled at different moisture levels and with high moisture corn grain
    Caswell, Larry Forrest (Virginia Tech, 1975-02-11)
    The feasibility of ensiling broiler litter alone, with added water or with high moisture corn grain was evaluated. Wood shaving based broiler litter was ensiled in small laboratory silos (about 4 liters) at moisture levels of 15.6 (no water added), 20, 30, 40 and 50%. Maximum fermentation was approached at 40% moisture as measured by silage pH and levels of lactic and acetic acids and water-soluble carbohydrates. Coliform bacteria were eliminated by ensiling at 20 to 50% moisture. In a subsequent study, litter was ground and 545 kg were ensiled alone (22% moisture) or with added water to elevate the moisture to 40%. Active fermentation occurred, and coliforms were eliminated in the silage containing 40% moisture. Twenty-four wethers and 12 steers were used in a metabolism study and a palatability study, respectively. Four rations were supplemented with: (1) dry heat processed litter [260 C at a depth of 1.3 cm for 30 min.]; (2) 22% moisture litter silage; (3) 40% moisture litter silage; or (4) soybean meal. Supplements supplied 50% of the dietary nitrogen in the metabolism trial. Nitrogen retention was lower (P<.01) for the ration supplemented with processed litter than for the other rations. Apparent digestibility was not significantly different among the three rations supplemented with litter, but digestion coefficients for dry matter and crude fiber were lower (P<.05) for the ration supplemented with soybean meal. Litter supplied 50% of the total ration dry matter in the palatability study. Dry matter intakes by cattle were similar for the two rations containing litter silage and were significantly (P<.01) lower than for cattle fed the conventional soybean meal supplemented ration. In another study, ground high moisture (26%) corn grain was ensiled alone or with ground litter in a 2 to 1 ratio in approximate 1 metric ton masses. The extent of fermentation in the corn-litter mixture was less than in corn ensiled alone. Twenty-four wethers were used in a metabolism trial and 12 steers were individually fed in two 15-day palatability trials. The four rations tested in both studies contained: (1) ensiled corn; (2) ensiled corn-litter mixture; (3) ensiled corn and dry heat processed litter [260 C at a depth of 1.3 cm for 30 min.]; or (4) ensiled corn and soybean meal. Nitrogen intake was similar for the three supplemented rations (2, 3, 4) fed in the metabolism study. Nitrogen retention was lowest (P<.01) for the unsupplemented ration (1). Retention was significantly higher (P<.01) for the soybean meal than for the litter-containing rations. This can be attributed mainly to lower fecal nitrogen excretion. Coefficients of apparent digestibility were usually significantly lower for the unsupplemented than for the supplemented rations. Apparent digestibility of crude protein was lower (P<.01) for both litter-containing rations than for the soybean meal supplemented ration. Digestion coefficients for dry matter, crude fiber, and NFE were not significantly different among rations 2, 3 and 4. Dry matter intakes tended to be higher for cattle fed litter than for those fed the soybean meal supplemented ration. Intake was lowest (P<.01) for the unsupplemented ration.
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    Virginia Horse Production Project. Mare and Foal
    Caswell, Larry Forrest (Virginia Cooperative Extension Service, 1977-07)
    The purpose of this project is to help you, as a 4-H club member:
    • enjoy pride of ownership in a horse that you have produced;
    • experience the satisfaction of raising a healthy, high quality horse;
    • learn from the responsibility of caring for your horse(s) each day;
    • learn the principles of scientific feeding, breeding, and management, necessary in raising horses;
    • learn to keep and use good business records;
    • enjoy and benefit from the experience of being an active member of a 4-H club.
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    Virginia Horse Riding Project. Horseman
    Caswell, Larry Forrest (Virginia Cooperative Extension Service, 1977-07)
    This is to certify that [name] has, by quiz or practical demonstration, successfully completed all of the requirements within each of the four sections of this record book to qualify as a HORSEMAN.
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    Virginia Horse Riding Project. Horsemaster
    Caswell, Larry Forrest (Virginia Cooperative Extension Service, 1979-02)
    This is to certify that [name] has, by quiz or practical demonstration, successfully completed all of the requirements within each of the four sections of this record book to qualify as a HORSEMASTER.