animal feeding operation Articles
-
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 ...
-
An integrated perspective on assessing agricultural air quality
The biogeochemical cycling of trace gases (e.g. nitrogen, sulphur, etc.), and contaminants on local, regional, and global scales is a complex system of emissions, transformations, transport, and deposition. To date, limited, if any, attempt has been made on quantifying and identifying direct emissions of gaseous sulphur compounds from agricultural operations. This represents a major regulatory ...
-
CAFO Manure Treatment-Struvite Removal and Struvite Prevention
CAFOs (Confined Animal Feeding Operations) face struvite in their manure holding ponds and manure lagoons, as well as their recirculation systems. On a dairy farm in Neb. that operated with 15,000 milking cows, they were generating 500,000 gal per day of wastewater laden with manure. Over the summer, they noticed a reduction in their pumping capacity because the first lagoon was filling faster ...
-
Trenbolone causes mortality and altered sexual differentiation in Xenopus tropicalis during larval development
Trenbolone is an androgen agonist used in cattle production and has been measured in aquatic systems associated with concentrated animal‐feeding operations. In this study, the authors characterized the effects of aqueous exposure to 17β‐trenbolone during larval Xenopus tropicalis development. Trenbolone exposure resulted in increased mortality of post‐Nieuwkoop–Faber stage 58 tadpoles at ...
-
Ammonia volatilization from Urea-based fertilizers applied to tall fescue pastures in Georgia, USA
The use of urea fertilizers in grasslands is likely to increase in areas with concentrated animal feeding operations as restrictions on manure applications are implemented. Concerns have been raised about the economic and environmental impacts of NH3 loss from these urea fertilizers. This study evaluated NH3 losses from Nitamin (a urea polymer), urea–NH4NO3 (UAN), and granular urea applied to ...
-
Nitrogen losses from dairy manure estimated through nitrogen mass balance and chemical markers
Received for publication February 13, 2009. Ammonia is an important air and water pollutant, but the spatial variation in its concentrations presents technical difficulties in accurate determination of ammonia emissions from animal feeding operations. The objectives of this study were to investigate the relationship between ammonia volatilization and 15N of dairy manure and the feasibility of ...
-
Rates and product identification for trenbolone acetate metabolite biotransformation under aerobic conditions
Trenbolone acetate (TBA) metabolites are endocrine active contaminants discharged into the aquatic environment in runoff from agricultural fields, rangelands, and concentrated animal feeding operations (CAFOs). To investigate the environmental fate of these compounds and their biotransformation mechanisms, we used inocula from a variety of different water sources and dosed biologically active ...
-
Managing waste from confined animal feeding operations in the United States: the need for sanitary reform
Confined food-animal operations in the United States produce more than 40 times the amount of waste than human biosolids generated from US wastewater treatment plants. Unlike biosolids, which must meet regulatory standards for pathogen levels, vector attraction reduction and metal content, no treatment is required of waste from animal agriculture. This omission is of concern based on dramatic ...
-
Seasonal Changes in Airborne Fungi and Bacteria at a Dairy Cattle Concentrated Animal Feeding Operation in the Southwest United States
The objective of this study was to evaluate a dairy located in the arid southwest United States to determine the concentrations and seasonal variation of airborne fungi and bacteria and to determine the percentage of antibiotic resistant Staphylococcus aureus. The authors used two-stage ambient air sampling systems to measure the culturable airborne fungal organisms and bacteria on a monthly ...
-
Season matters when sampling streams for swine CAFO waste pollution impacts
Concentrated (or confined) animal feed operations (CAFOs) are the principal means of livestock production in the United States, and such facilities pollute nearby waterways because of their waste management practices; CAFO waste is pumped from the confinement structure into a cesspit and sprayed on a field. Stocking Head Creek is located in eastern North Carolina, a state with >9,000,000 ...
-
Regulating the land application of manure from animal production facilities in the USA
Water pollution from the land application of manure has been cited as an issue that needs to be addressed. Judicial challenges have forced the US Environmental Protection Agency (EPA) to adopt additional controls governing concentrated animal feeding operations (CAFOs). State agencies have also been directed to do more to minimize the risk of pollution from animal production. In developing ...
-
Zone tillage depth affects yield and economics of corn silage production
Increasing numbers of dairies in northeastern United States are classified as confined animal feeding operations (CAFOs). Many dairy farmers in New York (NY) abandoned conventional and adopted zone tillage (ZT) in 4-yr corn (Zea mays L.) silage-alfalfa (Medicago sativa L.) rotations on highly erodible land to comply with NY CAFO plans. Farmers now question optimum ZT depth because of increased ...
-
Zone tillage depth affects yield and economics of corn silage production
Increasing numbers of dairies in northeastern United States are classified as confined animal feeding operations (CAFOs). Many dairy farmers in New York (NY) abandoned conventional and adopted zone tillage (ZT) in 4-yr corn (Zea mays L.) silage-alfalfa (Medicago sativa L.) rotations on highly erodible land to comply with NY CAFO plans. Farmers now question optimum ZT depth because of increased ...
-
Fate of indicator microorganisms under nutrient management plan conditions
Nutrient management plans (NMPs) for application of wastewater from concentrated animal feeding operations are designed to meet crop water and nutrient requirements, but implicitly assume that pathogenic microorganisms in the wastewater will be retained and die-off in the root zone. A NMP was implemented on a field plot to test this assumption by monitoring the fate of several fecal indicator ...
-
Building a Business with Nutrient Management
Laurelbrook Farm is a third-generation dairy farm in East Cannan, Connecticut. The Jacquier family owns 275 acres, and rents an additional 2,500 acres for cropping, to support a herd of 830 cows. The family began composting three years ago as part of the farm’s nutrient management plan, as well as to determine the market for compost in the area. “In 2003 the Environmental Protection ...
-
Transport of lincomycin to surface and ground water from manure-amended cropland
Livestock manure containing antimicrobials becomes a possible source of these compounds to surface and ground waters when applied to cropland as a nutrient source. The potential for transport of the veterinary antimicrobial lincomycin to surface waters via surface runoff and to leach to ground water was assessed by monitoring manure-amended soil, simulated rainfall runoff, snowmelt runoff, and ...
-
MILAS implementation at W & H Marriage & Sons
One single version of the truth for animal feed production and flour mill In 1824, William and Henry Marriage started to mill the wheat their family farm was producing. These brothers founded a rapidly growing company, by using wind and waterpower in order to mill bread flour. In 1899, the company moved its main office to Chelmer Mills in Chelmsford (English county of Essex), where it is ...
By BESTMIX
-
How precision feeding promotes sustainable livestock production
With Earth's population rapidly building towards eight billion within the next decade, every resource we produce is being stretched thin. Sustainability is becoming more than a simple buzzword of the environmental movement, it's now the prime focus of progress in our world. Though precision agriculture is a concept that has been around for decades, precision feeding is a newer concept. ...
By BESTMIX
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you