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| Registros recuperados: 284 | |
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| Angle, J. Scott; Linacre, Nicholas A.. |
| Phytoremediation is the use of living plants, known as hyperaccumulators which absorb unusually large amounts of metals in comparison to other plants. The use of classical plant breeding and new molecular techniques offers great potential to develop crops with the ability to clean up polluted sites. While these technologies have gained widespread attention, prior to commercial development, there are risks that must be considered – only a few of which have received even modest examination. Therefore, the focus of this working paper is to explore specific risks associated with phytoremediation and suggest ways in which these risks can be managed so that new, novel, and innovative plant technologies may be applied to provide low cost and efficient... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Risk; GMO; Biotechnology; Phytoremediation; Phytoextraction; Phytomining; Environmental risk; Crop Production/Industries; Q16; Q2. |
| Ano: 2005 |
URL: http://purl.umn.edu/59225 |
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| Liu, Xiaolan; Farmer, Michael. |
| Motivated to explore sustainability of renewable energy from bio-waste, this study attempted to discover the economic feasibility of effectively utilizing the existing agricultural waste to generate bio-energy, to complement local nucleus business by meeting specific market demands while assessing the reasonable risk associated with bio-energy production for an area with heavy concentration of agricultural production and serious water constraints. Since the problems to be addressed are all location specified critical points for bio-energy generation, GIS maps are used to identify the locations and the associated attainable volumes of agricultural waste. Meanwhile, reasonable variation and distribution of attainable cotton gin waste was identified by using... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Sustainability; Bio-energy; Agricultural waste; Economic feasibility; Risk; Agribusiness; Land Economics/Use. |
| Ano: 2010 |
URL: http://purl.umn.edu/61752 |
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| Uribe-Castañeda,Natalia; Satizabal,Carlos Andrés; Herrera Orozco,Leonardo; Cantera Kintz,Jaime Ricardo. |
| ABSTRACT Systems of Uramba Marine Protected Area (MPA), like marine and coastal systems worldwide, sustain a great variety of ecosystem services (ES) (i.e. coastal protection, climate regulation, or food provision, etc.). Anthropogenic and natural stressors (i.e. coastal erosion, sea level rise, or overfishing, etc.) can transform, degrade, or limit the supply of ecosystem services. This study explores the vulnerability of Uramba MPA ecosystem services to anthropogenic and natural stressors. Stressors and ecosystems services were characterized by a literature review, an expert’s workshop, fieldtrips for validation, and georeferencing. To calculate the vulnerability of ecosystem services, the magnitude of each stressor, their risks, and their resilience... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stressors; Resilience; Risk; Colombian Pacific; Tropical Eastern Pacific. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300095 |
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| Boere, Esther; Peerlings, Jack H.M.; Reinhard, Stijn; Kuhlman, Tom; Heijman, Wim J.M.. |
| Volatile output prices lead to a fluctuating shadow price (profitability) of agricultural land, and therefore may impact land use decisions in case of risk-averse behaviour. In this paper we assess the effect of volatile agricultural output prices on agricultural land-use change over the past decade in the Netherlands. Using regional data from 2000 through 2009, the number of hectares of land for 10 land uses was calculated. To determine the joint distribution of agricultural activities, hectares of land for each land use were converted to land share equations. Land share equations were estimated to determine the contribution of increased price volatility to land use change. Results show that larger volatility affects land shares negatively. Producer’s... |
| Tipo: Presentation |
Palavras-chave: Land-use; Risk; Price volatility; Risk and Uncertainty; Q1; D8. |
| Ano: 2012 |
URL: http://purl.umn.edu/122472 |
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| Heidelbach, Olaf. |
| Recent academic discussion regarding crop insurance in developing and transition countries has focused on weather index insurance. But empirical analyses of such schemes based on farm level data cannot be found in the literature, though this insurance type shows clear advantages compared to multiple-peril crop insurance and revenue insurance. Recent empirical applications of risk and stochastic programming models focus on the optimisation of production planning, while literature on the effects of crop insurance on the farm level mainly focuses on the empirical investigation of reductions in farm income variance. The novelty of this paper is that it integrates regionally-adapted insurance products and expert-evaluated technology choices into a programming... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Risk; Risk management; Insurance; Agriculture; Kazakhstan; Crop Production/Industries; Risk and Uncertainty; Q12; Q14; G22; D82. |
| Ano: 2006 |
URL: http://purl.umn.edu/25243 |
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| García Juárez, José de Jesús. |
| El objetivo de este trabajo es evaluar la eficiencia de las coberturas de precios de maíz blanco operadas por ASERCA. Para el estudio, se utiliza el análisis de cointegración de S. Johansen que consiste en probar la existencia de cointegración entre las variables de series de tiempo, en este caso: precios al mayoreo de maíz blanco, precio a futuro de maíz amarillo cotizado en la Bolsa de Futuros de Chicago (CBOT) y tipo de cambio peso-dólar; esta variable en particular, porque al adquirir una cobertura, existe también un riesgo cambiario dado que tanto la adquisición como la liquidación de las coberturas son realizadas en dólares. Los resultados indican que los precios de maíz al mayoreo de las centrales de abasto de Sinaloa, Jalisco, Estado de México,... |
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Palavras-chave: ASERCA; Cointegración; Riesgo; Serie de tiempo; Cointegration; Risk; Time series; Maestría; Economía. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/421 |
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| García Juárez, José de Jesús. |
| El objetivo de este trabajo es evaluar la eficiencia de las coberturas de precios de maíz blanco operadas por ASERCA. Para el estudio, se utiliza el análisis de cointegración de S. Johansen que consiste en probar la existencia de cointegración entre las variables de series de tiempo, en este caso: precios al mayoreo de maíz blanco, precio a futuro de maíz amarillo cotizado en la Bolsa de Futuros de Chicago (CBOT) y tipo de cambio peso-dólar; esta variable en particular, porque al adquirir una cobertura, existe también un riesgo cambiario dado que tanto la adquisición como la liquidación de las coberturas son realizadas en dólares. Los resultados indican que los precios de maíz al mayoreo de las centrales de abasto de Sinaloa, Jalisco, Estado de México,... |
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Palavras-chave: ASERCA; Cointegración; Riesgo; Serie de tiempo; Cointegration; Risk; Time series; Maestría; Economía. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/421 |
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| Sempere, Loreto Pardo; Alcaide, Jose Javier Rodriguez. |
| Las fuertes inversiones iniciales que son necesarias para comenzar una actividad acuícola, unidas al período tan dilatado del ciclo de explotación y al riesgo que esta actividad comporta, son situaciones que comprometen el futuro de la actividad cuya continuidad pasa necesariamente por la consecución de la viabilidad económica. Por ello, es importante prestar atención a los estudios que justifiquen esta viabilidad económica considerando aspectos tales como la propia flexibilidad operativa o el valor estratégico que tiene cada proyecto de inversión, a menudo considerados factores críticos para la supervivencia. Desde esta perspectiva, se pone de manifiesto la necesidad y la oportunidad de la investigación, basado en la aplicación del método de Opciones... |
| Tipo: Journal Article |
Palavras-chave: Aquaculture; Real Options; Risk; Flexibility in operations; Risk and Uncertainty; B41; C15; D81. |
| Ano: 2005 |
URL: http://purl.umn.edu/28786 |
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| Lawrence, John D.; Wang, Zhi; Loy, Daniel D.. |
| Conventional wisdom and earlier research have concluded that cattle feeding profitability is more determined by feeder and fed cattle prices than by animal performance. This study examined cross-sectional and time-series data from over 1600 pens of cattle in more than 220 feedlots in the upper Midwest where weather and lot conditions are thought to influence feedlot profitability. In addition to input and output prices and animal performance, other factors found to significantly impact cattle feeding profitability were sex, placement weight, facility design, and to a lesser extent placement season. |
| Tipo: Journal Article |
Palavras-chave: Cattle feedlots; Probability; Risk; Livestock Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/15377 |
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| Sauer, Johannes; Walsh, John. |
| This study empirically investigates the cost-effectiveness of different agri-environmental policy instruments. We compare the Environment Stewardship Scheme (ESS) as an example for a management agreement type instrument, to the Nitrate Vulnerable Zones (NVZ) as an example for a command-and-control type instrument. Both instruments are currently applied in the UK. Based on a simple cost model considering also relevant transaction costs and risk we use different regression and resampling techniques to estimate the marginal effects of different factors with respect to the instruments‟ relative cost-effectiveness and to identify factors for cost variation over space and time. We control for the actual level of compliance by using compliance weighted average... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agri-Environmental Instruments; Costs; Risk; Risk and Uncertainty. |
| Ano: 2011 |
URL: http://purl.umn.edu/108963 |
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| Registros recuperados: 284 | |
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