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| Registros recuperados: 601 | |
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| Leytem, A.B.; Dungan, R.S.. |
| livestock operations can potentially affect air quality at local, regional, and even global scales. These pollutants, many of which are generated through various anthropogenic activities, are being increasingly scrutinized by regulatory authorities. Regulation of emissions from livestock production systems will ultimately increase on farm costs, which will then be passed onto consumers. Therefore, it is essential that scientifically based emission factors are developed for on-farm emissions of air quality constituents to improve inventories and assign appropriate reduction targets. To generate a larger database of on-farm emissions, the USDA–ARS created the workgroup Livestock GRACEnet (Greenhouse gas Reduction through Agricultural Carbon Enhancement... |
| Tipo: Article |
Palavras-chave: Air Emissions; Application guidelines; Chemistry. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1542/1/1499.pdf |
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| Smith, D.R.; Owens, P.R.; Leytem, A.B.; Warnemuende, E.A.. |
| Nutrient losses to surface waters following fertilization contribute to eutrophication. This study was conducted to compare the impacts of fertilization with inorganic fertilizer, swine (Sus scrofa domesticus) manure or poultry (Gallus domesticus) litter on runoff water quality, and how the duration between application and the first runoff event affects resulting water quality. Fertilizers were applied at 35 kg P ha-1-, and the duration between application and the first runoff event varied between 1 and 29 days. Swine manure was the greatest risk to water quality 1 day after fertilization due to elevated phosphorus (8.4 mg P L -1) and ammonium (10.3 mg NH4-N L-1) concentrations; however, this risk decreased rapidly. Phosphorus concentrations were 2.6... |
| Tipo: Article |
Palavras-chave: Nutrients; Chemistry; Fertilizer; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/61/1/1223.pdf |
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| Lentz, R.D.; Ippolito, J.A.; Spokas, K.A.. |
| Few multiyear field studies have examined the impacts of a one-time biochar application on net N mineralization and greenhouse gas emissions in an irrigated, calcareous soil; yet such applications are hypothesized as a means of sequestering atmospheric CO2 and improving soil quality. We fall-applied four treatments, stockpiled dairy manure (42 Mg/ha dry wt.); hardwood-derived biochar (22.4 Mg/ha); combined biochar and manure; and no amendments (control). Nitrogen fertilizer was applied in all plots and years based on treatment’s pre-season soil test N and crop requirements, and accounting for estimated N mineralized from added manure. From 2009 to 2011 we measured greenhouse gas fluxes using vented chambers, net N mineralization (NNM) using buried bags,... |
| Tipo: Article |
Palavras-chave: Corn; Manure; Chemistry; Nitrogen; Soil. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1558/1/1514.pdf |
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| Ippolito, J.A.; Blecker, S.W.; Freeman, C.L.; McCulley, R.L.; Blair, J.M.; Kelly, E.F.. |
| Soil P transformations and distribution studies under water limited conditions that characterize many grasslands may provide further insight into the importance of abiotic and biotic P controls within grassdominated ecosystems. We assessed transformations between P pools across four sites spanning the shortgrass steppe, mixed grass prairie, and tallgrass prairie along a 400-mm precipitation gradient across the central Great Plains. Pedon total elemental and constituent mass balance analyses reflected a pattern of increased chemical weathering from the more arid shortgrass steppe to the more mesic tallgrass prairie. Soil surface A horizon P accumulation was likely related to increased biocycling and biological mining. Soluble P, a small fraction of total P... |
| Tipo: Article |
Palavras-chave: Soil; Phosphorous; Chemistry. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1370/1/1353.pdf |
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| Moore, Amber; Satterwhite , Megan; Ippolito, J.A.. |
| A rising concern with the application of dairy wastes to agricultural fields is the accumulation of copper in the soil. Copper sulfate from cattle footbaths is washed out of dairy barns and into wastewater lagoons. Potato growers are concerned about this issue, as many of the predominant dairy producing areas in Southern Idaho are also in Idaho’s established potato production regions. The objective of this project was to evaluate potato growth and copper plant uptake for potatoes grown under low, moderate, and excessively high soil copper concentrations. This study was conducted in 2011 in a greenhouse setting at the USDA ARS Kimberly Research Station. To establish an effective copper response curve, 6 rates of copper sulfate (0, 100, 200, 300, 400, and... |
| Tipo: Technical Bulletin |
Palavras-chave: Potato; Chemistry; Manure. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1478/1/1443.pdf |
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| Ippolito, J.A.; Ducey, Tom; Tarkalson, D.D.. |
| Copper sulfate foot baths are a management practice used by dairy farms in an effort to control hoof infections. As an unintended consequence, agricultural soils experience Cu accumulation when spent foot baths are disposed of in wastewater lagoons that are utilized for irrigation purposes. We investigated the effect of Cu applications (up to 1000 mg/kg) to a Xeric Haplocalcid (Declo series) and a Typic Calciaquoll (Logan series) on alfalfa (Medicago sativa) growth and Cu concentration, soil total and diethylenetriaminepentaacetic acid (DTPA)-extractable Cu, and the soil microbial community diversity using ribosomal intergenic spacer analysis (RISA). Copper application up to 250 mg/kg did not affect alfalfa growth; above 500 mg/kg alfalfa did not grow.... |
| Tipo: Article |
Palavras-chave: Alfalfa; Application guidelines; Chemistry; Manure. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1423/1/1393.pdf |
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| Registros recuperados: 601 | |
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