cattle feedlot Articles
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US feedlots and slaughterhouses: bounding industrial ecology with the extreme case
The potential contribution of Industrial Ecology (IE) to sustainable development, though immense, remains elusive. This is due to the field boundaries whose demarcation lacks specificity. To address the challenge of boundary definition, an agro-industrial complex, the US Cattle Feedlot-Slaughterhouse System (CFSS), has been chosen to illustrate and provoke a discussion about where those ...
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Nutrient accumulation below cattle feedlot pens in Kansas
Received for publication April 30, 2008. Waste excreted on cattle (Bos taurus) feedlot pens is a source of N and other nutrients that could potentially leach into soil and negatively impact local groundwater quality. Analyses of soil chemical and physical properties beneath active open air feedlot pens were conducted at four Kansas locations to determine nutrient accumulation. Results were ...
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Ammonia and hydrogen sulphide flux and dry deposition velocity estimates using vertical gradient method at a commercial beef cattle feedlot
Ammonia and hydrogen sulphide flux and dry deposition velocity were estimated using micrometeorological vertical gradient flux method at a commercial cattle feedyard of approximately 50,000 head of beef cattle and average 14.4 m²/head (150 ft²/head) stocking density. Ammonia-N and H2S-S loss had general diurnal patterns with the highest fluxes in daytime and lowest fluxes in nighttime that ...
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Effects of dried distillers` grains with solubles (wheat-based) in feedlot cattle diets on feces and manure composition
The use of dried distillers' grains with solubles (DDGS) in feedlot cattle (Bos taurus) diets is increasing as the bio-ethanol industry expands. This study investigated how wheat (Triticum aestivum L.) DDGS-based diets impact feedlot cattle nutrient and volatile fatty acid (VFA) excretion. Feedlot heifers were fed DDGS at 0 (Control) 20, 40, 60% or 60% + Ca (1% limestone) of dietary dry matter. ...
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Bacterial contamination in Fresh produce
Fresh fruit and vegetables are an important part of our diet. If produce is contaminated by poorly sourced water, however, the implications can be fatal. While many people associate foodborne illness with meat and dairy, it is important to recognize that fruits and vegetables can pose a significant threat to public health if hygienic water sourcing is not upheld. We take a closer look this week ...
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Moving Up the Food Chain
For most of the time that human beings have walked the earth, we lived as hunter-gatherers. The share of the human diet that came from hunting versus gathering varied with geographic location, hunting skills, and the season of the year. During the northern hemisphere winter, for instance, when there was little food to gather, people there depended heavily on hunting for survival. Our long history ...
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Magnesium Bioavailability Update
What have we learned about magnesium nutrition in animals during the past few years? Several research reports have been published which increase our understanding of Mg utilization. While an earlier generation of researchers concentrated more of their efforts on solving the grass tetany problem, recent research has emphasized the areas of absorption, bioavailability of Mg sources, the effects of ...
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