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Registros recuperados: 139
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Adoption of Phytase by Livestock Farmers AgEcon
Stahlman, Michael; McCann, Laura M.J.; Gedikoglu, Haluk.
Phytase represents a potential win/win management practice for non-ruminant producers since it can reduce the need for phosphorous supplementation and also result in lower phosphorous runoff. Cost of phytase has decreased and cost of phosphorous has increased. The reported adoption rate for phytase for non-ruminants was 17.2 percent, however it is currently added to virtually all swine and poultry premixes by feed manufacturers due to the cost savings. People were more likely to say they use phytase if they think it is profitable, not time intensive, and improves water quality.
Tipo: Conference Paper or Presentation Palavras-chave: Manure; Phytase; Phosphorous; Adoption; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/43235
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Adubação de capim-elefante (Pennisetum purpureum Schum.) puro e consorciado com kudzu tropical (Pueraria phaseoloides). Repositório Alice
PIMENTEL, D. M.; SIMÃO NETO, M.; SERRÃO, E. A. S.; VEIGA, J. B. da..
1986
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Gramínea forrageira; Leguminosa forrageira; Pastagem consorciada; Fertilizante; Capim elefante; Kudzu; Esterco de gado; Pennisetum purpureum; Pueraria phaseoloides; Feed grasses; Feed legumes; Fertilizers; Farmyard; Manure; Mixed pastures.
Ano: 1986 URL: http://www.alice.cnptia.embrapa.br/handle/doc/394667
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Adubação orgânica e mineral do melão em vertissolo. Infoteca-e
FARIA, C. M. B. de; PEREIRA, J. R.; POSSIDIO, E. L. de..
2000
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Melão; Adubação orgânica; Mineral; Cucumis melo; Melons; Manure.
Ano: 2000 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/134095
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Adubação orgânica e mineral na cultura do melão em um vertissolo do Submédio São Francisco. Infoteca-e
FARIA, C. M. B. de; PEREIRA, J. R.; POSSIDIO, E. L. de..
Determinacao de niveis adequados de adubacao N, P e K na cultura do melao e verificar sua resposta a aplicacao de materia organica.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Melão; Matéria orgânica; Irrigação; Eldorado 300; Nitrogênio; Fósforo; Potássio; Fertilização; Vertissolo; Adubação; Solo; Cucumis melo; Melons; Organic fertilizer; Manure; Soil; Irrigation; Potassium; Nitrogen; Phosphorus; Melão; Solo; Melon; Soil.
Ano: 1995 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/132024
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Aggregate stability as affected by short and long-term tillage systems and nutrient sources of a hapludox in southern Brazil Rev. Bras. Ciênc. Solo
Veiga,Milton da; Reinert,Dalvan José; Reichert,José Miguel.
The ability of a soil to keep its structure under the erosive action of water is usually high in natural conditions and decreases under frequent and intensive cultivation. The effect of five tillage systems (NT = no-till; CP = chisel plowing and one secondary disking; CT = primary and two secondary distings; CTb = CT with crop residue burning; and CTr = CT with removal of crop residues from the field), combined with five nutrient sources (C = control, no nutrient application; MF = mineral fertilizers according to technical recommendations for each crop; PL = 5 Mg ha-1 y-1 fresh matter of poultry litter; CM = 60 m³ ha-1 y-1 slurry cattle manure; and SM = 40 m³ ha-1 y-1 slurry swine manure) on wet-aggregate stability was determined after nine years (four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil tillage; Manure; Sampling time; Soil structure; Aggregation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000400003
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Airborne endotoxin concentrations at a large open-lot dairy in southern Idaho NWISRL
Dungan, R.S.; Leytem, A.B..
Endotoxins are derived from gram-negative bacteria and are a potential respiratory health risk for animals and humans. To determine the potential for endotoxin transport from a large open-lot dairy, total airborne endotoxin concentrations were determined at an upwind location (background) and five downwind locations on three separate days. The downwind locations were situated at of the edge of the lot, 200 and 1390 m downwind from the lot, and downwind from a manure composting area and wastewater holding pond. When the wind was predominantly from the west, the average endotoxin concentration at the upwind location was 24 endotoxin units (EU) m?3, whereas at the edge of the lot on the downwind side it was 259 EU m?3. At 200 and 1390 m downwind...
Tipo: Article Palavras-chave: Manure.
Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1330/1/1307.pdf
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Anatomy of a field trial: Wood-based biochar and compost influences a Pacific Northwest soil NWISRL
Ippolito, J.A.; Grob, J; Donnelly, A.
Biochar land application research in elevated rainfall areas (980 millimeters of annual rainfall) of the U.S. Pacific Northwest is lacking. A proof-of-concept field study examined the effects of spruce-pine-fir wood chip biochar (slow pyrolysis; 450-500 degrees Celsius; 35 megagrams per hectare), dairy manure compost (105 megagrams per hectare), compost + biochar (35 and 105 megagrams per hectare, respectively), and a control (no biochar or compost) on glacially altered soil (sandy or loamy skeletal, isotonic, mesic humic or aquic Dystroxerepts) chemical properties and growth characteristics of vetch and sweet corn over a growing season. In-season liming (5.4 megagrams per hectare) occurred to raise the soil pH for adequate crop growth. Biochar, alone...
Tipo: Article Palavras-chave: Chemistry; Manure; Research methodology; Fertility.
Ano: 2015 URL: http://eprints.nwisrl.ars.usda.gov/1595/1/1553.pdf
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Antibiotics in agroecosystems: Introduction to the special section NWISRL
Franklin, A.M.; Aga, D.S.; Cytryn, Eddie; Durso, L.M.; Mclain, J.E.; Pruden, Amy; Roberts, M.C.; Rothrock, Jr, M.J.; Snow, D.D.; Watson, J.E.; Dungan, R.S..
The presence of antibiotic drug residues, antibiotic resistant bacteria, and antibiotic resistance genes in agroecosystems has become a significant area of research in recent years, and is a growing public health concern. While antibiotics are utilized for human medicine and agricultural practices, the majority of antibiotic use occurs in food animals where these drugs have historically been used for growth promotion, in addition to prevention and treatment of disease. The widespread use of antibiotics combined with the application of human and animal wastes to agricultural fields introduces antibiotic-related contamination into the environment. While overt toxicity in organisms directly exposed to antibiotic in agroecosystems is generally not an issue due...
Tipo: Article Palavras-chave: Air Emissions; Animal; Runoff; Manure.
Ano: 2016 URL: http://eprints.nwisrl.ars.usda.gov/1614/1/1571.pdf
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Asymmetric Willingness-to-Pay Distributions for Livestock Manure AgEcon
Norwood, F. Bailey; Luter, Ryan L.; Massey, Raymond E..
The Environmental Protection Agency's new Concentrated Animal Feeding Operations (CAFO) regulations are forcing some farms to export livestock manure to off-farm acres. The regulation compliance cost depends on the willingness of neighboring crop producers to accept or pay for the manure. This study estimates a manure willingness-to-pay distribution for crop producers using a contingent valuation mail survey. A flexible parametric distribution is borrowed from the crop yield literature, which shows that manure willingness to pay is left-skewed. Most crop producers in our sample will pay a positive price close to the savings in commercial fertilizer, but approximately 25% require a payment before accepting manure.
Tipo: Journal Article Palavras-chave: Animal waste; Asymmetric distribution; Contingent valuation; Manure; Nonmarket valuation; Pollution; Willingness to pay; Environmental Economics and Policy.
Ano: 2005 URL: http://purl.umn.edu/30972
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Biochar and Manure Affect Calcareous Soil and Corn Silage Nutrient Concentrations and Uptake. NWISRL
Lentz, R.D.; Ippolito, J.A..
When added to soils, carbon-rich biochar derived from the pyrolysis of woody materials can sequester atmospheric carbon dioxide, mitigate climate change, and potentially increase crop productivity. However, research is needed to confirm the suitability and sustainability of biochar application to different soils. We applied four treatments (dry wt.) to an irrigated calcareous soil in Nov. 2008: control; stockpiled dairy manure, 18.8 Mg/ha; hardwood-derived biochar, 22.4 Mg/ha; and manure + biochar using previous rates. Nitrogen fertilizer was applied when needed (based on pre-season soil test N and crop requirements) in all plots and years with N mineralized from added manure included in this determination. Available soil nutrients (NH4-N, NO3-N, Olsen...
Tipo: Article Palavras-chave: Corn / maize; Manure; Calcareous soil; Soil.
Ano: 2012 URL: http://eprints.nwisrl.ars.usda.gov/1459/1/1424.pdf
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Biochar and manure effects on net nitrogen mineralization and greenhouse gas emissions from calcareous soil under corn NWISRL
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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BIOGAS PRODUCTION IN DAIRY CATTLE SYSTEMS, USING BATCH DIGESTERS WITH AND WITHOUT SOLIDS SEPARATION IN THE SUBSTRATES REA
Anjos,Isis Dos; Toneli,Juliana T. C. L.; Sagula,Alex L.; Lucas Junior,Jorge de.
ABSTRACT This research aimed to evaluate the biogas production during the anaerobic biodigestion process of dairy cattle manure, with and without solids separation. Sixteen biodigesters of the batch type were used, each one with 2L of capacity, supplied with manure in four different conditions: (1) pure manure, after washing the floors of the free stall system; (2) manure after the solids separator; (3) manure after the solids separator and sand decanter and (4) manure with the solid retained in separator solids, dissolved in water. The hydraulic retention time was of 196 days. The highest reductions of volatile solids (VS) were obtained for the biodigesters supplied with manure that went through some process of solids separation. The highest potential of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Biodigester; Manure; Dairy cattle; Solid separation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300426
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Case Study: On-Farm Evaluation of Liquid Dairy Manure Application Methods to Reduce Ammonia Losses NWISRL
Leytem, A.B.; Bjorneberg, D.L.; Sheffield, R.E.; de Haro Marti, M.E..
The volatilization of NH3 from landapplied manure is not only a loss of valuable N, but also an air quality concern because NH3 plays a role in the formation of airborne particulate matter, which can be a health hazard. The relative differences in potential NH3 losses from land application of liquid dairy manure were determined via 3 methods: surface application, Aerway incorporation (shallow incorporation with a rolling tine aerator), and subsurface injection. Liquid manure was applied at a rate of 190 m3/ha on 4 farms with average N and P application rates ranging from 28 to 130 kg N/ha and 6 to 36 kg P/ha, respectively. Average NH3 concentrations were measured with passive samplers for 3 d after manure application and ranged from 0.03 to 0.21 mg...
Tipo: Article Palavras-chave: Soil; Manure; Animal; Soil quality.
Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1366/1/1343.pdf
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Case Study: Seasonal and Spatial Distribution of Ambient Ammonia Concentrations Measured at a Large Open-Lot Dairy NWISRL
Leytem, A.B.; Dungan, R.S.; Bjorneberg, D.L..
The volatilization of NH3 from dairy production facilities is not only a loss of valuable N, but also an air quality concern because NH3 plays a role in the formation of airborne particulate matter, which can be a health hazard. The ambient NH3 concentrations over several seasons at 3 locations (open lots, compost yard, lagoon) throughout a large openlot dairy were determined, as well as the spatial distribution of NH3 over the open-lot area. There was a significant main effect of location (P < 0.0001), which followed the trend of lot > lagoon = compost > background, with averages of 0.58, 0.33, 0.30, and 0.04 mg NH3/m3, respectively. The effect of weather and lot conditions on the spatial distribution of NH3 across the lots was evident, with...
Tipo: Article Palavras-chave: Manure; Soil; Animal.
Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1367/1/1344.pdf
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Changes in soil acidity and organic carbon in a sandy typic hapludalf after medium-term pig-slurry and deep-litter application Rev. Bras. Ciênc. Solo
Brunetto,Gustavo; Comin,Jucinei José; Schmitt,Djalma Eugênio; Guardini,Renato; Mezzari,Célito Pescador; Oliveira,Bruno Salvador; Moraes,Marcel Pires de; Gatiboni,Luciano Colpo; Lovato,Paulo Emilio; Ceretta,Carlos Alberto.
Successive applications of liquid swine waste to the soil can increase the contents of total organic carbon and nutrients and change acidity-related soil chemical properties. However, little information is available on the effects of swine waste application in solid form, as of swine deep-litter. The objective of this study was to evaluate alterations of organic carbon and acidity-related properties of a soil after eight years of pig slurry and deep-litter application. In the eighth year of a field experiment established in Braço do Norte, Santa Catarina (SC) on a sandy Typic Hapludalf samples were taken (layers 0-2.5; 2.5-5; 5-10; 10-15; 15-20 and 20-30 cm) from unfertilized plots and plots with pig slurry or deep-litter applications, providing the simple...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manure; Water pH; Base saturation; Aluminum saturation; No tillage.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500026
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Changes in soil test phosphorus and phosphorus in runoff from calcareous soils receiving manure, compost, and fertilizer application with and without alum NWISRL
Leytem, A.B.; Bjorneberg, D.L..
Tipo: Article Palavras-chave: Calcareous soil; Manure; Phosphorous; Furrow irrigation.
Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1355/3/1332.pdf
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Changes in soil test phosphorus and phosphorus in runoff from calcareous soils receiving manure, compost, and fertilizer application with and without alum NWISRL
Leytem, A.B.; Bjorneberg, D.L..
Intensification of the dairy industry in southern Idaho had led to the over-application of manures and a buildup of soil phosphorus (P) which is a potential threat to water quality in the region. As the use of alum has been shown to reduce both soluble manure P and runoff P from alum treated manures, the objective of this study was to determine if surface applications of alum to dairy manure and compost prior to soil incorporation would reduce P losses under furrow irrigation on a calcareous soil. The effects of manure, compost, and fertilizer application with and without alum treatment on soil P, runoff P and aluminum (Al) under furrow irrigation, crop yield, tissue P concentrations and P removal over a four year period were investigated in Kimberly, ID,...
Tipo: Article Palavras-chave: Manure; Calcareous soil; Phosphorous.
Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1432/1/1332.pdf
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Climate Change Policy and the Adoption of Methane Digesters on Livestock Operations AgEcon
Key, Nigel D.; Sneeringer, Stacy E..
Methane digesters—biogas recovery systems that use methane from manure to generate electricity—have not been widely adopted in the United States because costs have exceeded benefits to operators. Burning methane in a digester reduces greenhouse gas emissions from manure management. A policy or program that pays producers for these emission reductions—through a carbon offset market or directly with payments—could increase the number of livestock producers who would profit from adopting a methane digester. We developed an economic model that illustrates how dairy and hog operation size, location, and manure management methods, along with electricity and carbon prices, could influence methane digester profits. The model shows that a relatively moderate...
Tipo: Report Palavras-chave: Methane; Methane digesters; Manure; Livestock; Climate change; Greenhouse gases; Carbon offset; Environmental Economics and Policy; Financial Economics; Livestock Production/Industries; Resource /Energy Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/102758
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Co-digestion of swine excreta associated with increasing levels of crude glycerin R. Bras. Zootec.
Orrico Junior,Marco Antonio Previdelli; Schwingel,Alice Watte; Centurion,Stanley Ribeiro; Orrico,Ana Carolina Amorim.
ABSTRACT The objective of this research was to evaluate the performance of anaerobic co-digestion of swine excreta associated with increasing doses of crude glycerin and different hydraulic retention times (HRT). A completely randomized design was adopted in a 3 × 4 factorial arrangement composed of three HRT (10, 17, and 24 days) and four crude glycerin doses (0, 5, 10, and 15 g/100 g of total solids [TS]), with four replications per treatment. The assessed parameters were: biogas production potential, reductions of volatile solids (VS), chemical oxygen demand (COD), and most probable number of total and thermotolerant coliforms. The biogas production per added VS presented quadratic effect at 17 and 24 days of HRT, with ideal doses of 5.5 and 5.9 g of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiesel; Biogas; Manure; Waste.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000300101
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Completely automated open-path FT-IR spectrometry NWISRL
Griffiths, P.R.; Shao, L.; Leytem, A.B..
Tipo: Article Palavras-chave: Manure.
Ano: 2009 URL: http://eprints.nwisrl.ars.usda.gov/1304/1/1281.pdf
Registros recuperados: 139
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