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Showing 1 to 20 of 370 for “"manure"”.
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Ammonia Emissions from Dairy Manure Storage Tanks Affected by Diets and Manure Removal Practices
… emission rates from stored scraped and flushed manure from dairy cows fed either normal or low N diet; and 2) seasonal effects on ammonia emission rates from stored scraped and flushed dairy manure. Four pilot-scale tanks were used for manure storage with different treatments - scraped manure …
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Impact of Manure Management Practices on the Environmental Fate of Antibiotics in Manure-Applied Fields
… and antibiotic resistance genes from animal manure applied to soil as fertilizer are now among the most concerned contaminants in soil. The widespread use of antibiotics in livestock might amplify the risk of developing antibiotic resistance, causing once treatable diseases to turn deadly. …
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Impact of Manure Land Management Practices on Manure Borne Antibiotic Resistant Elements (AREs) in Agroecosystems
… primarily with livestock rearing. Animal manure land application integrates livestock farming and agroecosystems. This manure contains antibiotic resistant elements (AREs) (resistant bacteria, resistance genes, and veterinary antibiotics) that contribute towards antimicrobial resistance. …
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Cattle manure characteristics in relation to manure accumulation period and seasonal impacts in the intermountain west
… from food waste to animal waste, including manure. There are limited application of AD technology to process beef cattle manure compared to other manure sources due to factors such as method of collection processes (i.e., scraped on dry lots) and inconsistent methane gas produced due to …
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Experimental manure handling systems for reducing airborne contamination
… that research program was to design and test a manure handling system to control the air contamination from the excreta. The goal was to get close to zero air contamination from manure with these systems, in order to measure the contamination from other sources, and to also have a range of …
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Viability of weed seeds in manure and silage
Where manures are spread out on the fields, this problem is extremely important, but where manures are hauled out into the pastures or some pot hole and there burned or left, never to be utilized, weed seeds in manure are of no concern. However, the majority of the farmers do spread the barnyard …
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Evaluation of a solid-liquid manure separation operation
… scraper and gravity flow system to separate manure into solid and liquid portions. The objectives of this research were to evaluate the performance of a solid-liquid separation finishing barn in improving manure nutrient management, the potential for nutrient/water recycling based on …
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Enhanced Biological Phosphorus Removal for Liquid Dairy Manure
… examined the application of EBPR to treat dairy manure. This study was conducted to evaluate the (i) performance of pilot-scale EBPR systems treating liquid dairy manure, to balance the ratio of nitrogen to phosphorus in manure to meet crop nutrient requirements, (ii) effects of dissolved oxygen …
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Effects of Feeding Phytase Enzyme and HAP Corn on Solubility of Phosphorus, Copper, and Zinc in Turkey Manure and Manure-Amended Soils
Manure from turkey poults on five diets were extracted both fresh (wet) and after drying. Soils amended with wet manure were also extracted. Phosphorus, Cu, and Zn were extracted with 0.01 M CaCl₂ and acidic Mehlich III extractant (Zn in soil extracts was not evaluated). Dietary treatments were (1) …
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Strategies to improve crop recovery of swine manure nitrogen
… swine operations produce large amounts of manure that must be dealt with responsibly. Liquid swine manure (LSM) collected in storage units is applied to cropland as a nutrient source. Maximizing crop utilization of the nitrogen (N) added in manure is important to achieve economic and …
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Experimental investigation of biogas production from feedlot cattle manure
… is focused on the biogas generation from cattle manure. The manure was analysed for weight loss over 40 days and the energy content determined. The biogas volume produced was measured as a function of time until there was no measurable gas formation after 41 days. The biogas was analysed for …
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Dairy Manure Flushwater Treatment by Packed-Bed Anaerobic Digesters
<p>Wastewater treatment performance of three pilot-scale packed-bed anaerobic digesters with walnut shell medium was researched for treating dairy freestall barn flushwater. Reciprocation mixing was evaluated as a means to lessen channelization in the media bed and to improve biogas production and …
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Kinetic Parameters in Thermophilic Methane Fermentation of Swine Manure
… of thermophilic digestion of unmedicated swine manure. The experimental design was set up to test the effects of temperature, retention time and feed concentration on these parameters using the modified Contois model. Feed concentrations of 3%, 4%, 5% and 6% VS in influent were tried at 5-, 8- …
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Water Quality Impacts of Cover Crop/Manure Management Systems
… a rye cover crop and application of liquid dairy manure in the spring and fall. The four management systems were: 1) traditional, 2) double-crop, 3) roll-down, and 4) undercut. In the fourth system, manure was applied below the soil surface during the undercutting process. In all other systems, …
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Mineralization of Nitrogen in Liquid Dairy Manure During Storage
Loss of nitrogen (N) from dairy manure during storage is an issue of economic, environmental, and social concern for farming communities. The lost N 1) decreases the value of manure as a fertilizer and is an economic loss because supplemental inorganic N fertilizer is purchased to meet N needs on …
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Nitrogen dynamics and biological response to dairy manure application
Animal manures are land applied in agronomic systems to supply essential crop nutrients and decrease dependency on chemical fertilizers. Liquid manures are traditionally surface broadcast to fields and sometimes incorporated to reduce odor and nutrient losses; however, incorporation is incompatible …
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Soil conditions and early crop growth after repeated manure applications
… and cattle industries has led to an increase of manure application to agricultural lands in Saskatchewan. Studies have been conducted to determine the nutrient benefits of swine manure application. However, a need was also identified for information on the effects of manure application on soil …
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Odor Control and Degradation of Swine Manure With Minimum Aeration
Made available in DSpace on 2014-12-09T20:03:10Z (GMT). No. of bitstreams: 1 7105070.pdf: 5275847 bytes, checksum: 428ad3292fdb4897c8070d37f8ddcf6d (MD5) Previous issue date: 1970
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Manure and Nutrient Accretion, Partitioning, and Excretion in Holstein Heifers
Considerable changes have occurred in environmental regulations in recent years, only one of which is the requirement of stand alone heifer operations and feedlots to carry environmental permits. While growth of heifers is a widely researched topic, publications concerning nutrient utilization, …
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