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A Partial Equilibrium Model of the Beef and Dairy Sector in Italy Under Imperfect Competition AgEcon
Moro, Daniele; Sckokai, Paolo; Soregaroli, Claudio.
In this paper we present a partial equilibrium model for the bovine sector (beef and dairy) in Italy, which can be used for simulation and forecasting. The structure of the model follows the vertical chain of the beef and dairy sector, allowing trade of both agricultural raw materials and final products. Since the processing and retailing stage is characterised by an imperfectly competitive structure, the model accounts for market power in modelling the price transmission mechanism. This provides further insights on the vertical transmission of shocks, both at the final level (i.e. the BSE crisis) and at the farm level (i.e. agricultural policy reform).
Tipo: Conference Paper or Presentation Palavras-chave: Simulation models; Policy analysis; Imperfect competition; Beef; Dairy; Livestock Production/Industries.
Ano: 2002 URL: http://purl.umn.edu/24787
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Agricultural water productivity: estimation at plot, farm and basin scale AgEcon
Cook, Simon; Gichuki, Francis; Turral, Hugh.
Tipo: Working or Discussion Paper Palavras-chave: Irrigated farming; Productivity; Estimation; Water balance; Water use; Simulation models; Water use efficiency; Livestock; Fisheries; Production Economics; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/91959
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An expert system for planning and designing dairy farms in hot climates CIGR Journal
Mohamed Samer; Cairo University, Faculty of Agriculture, Department of Agricultural Engineering; Mohamed Hatem; Hartmut Grimm; Reiner Doluschitz; Thomas Jungbluth.
Eleven simulation models were developed to plan and design several dairy farm facilities.  Subsequently, an electronic spark map (decision tree) was developed for each simulation model, and then the simulation models were integrated into the relevant spark maps.  Afterwards, C# language (C Sharp), which is an object-oriented programming language, was used to develop an expert system via the simulation models and the electronic spark maps.  The developed expert system is able to plan and design several dairy farm facilities, e.g. housing system (corrals system), shade structure and roof material, concrete base, cooling system, milking parlour, forage storage, and manure handling system.  Subsequently, it plans the farmstead layout, and it leads to implement...
Palavras-chave: Expert systems; Simulation models; Spark maps; Precision livestock farming; Dairy cows.
Ano: 2012 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2088
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Análise de sensibilidade do modelo de Caprio para simulação de evolução de resistência de pragas a toxinas BT. Infoteca-e
MAIA, A. de H. N.; DOURADO NETO, D..
2009
Tipo: Documentos (INFOTECA-E) Palavras-chave: Modelo de Caprio; Praga de planta; Resistência a pesticida; Modelo de simulação; Planta transgênica; Plant pests; Pesticide resistance; Simulation models; Transgenic plants.
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/83084
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Analysis of yield gaps in farmer's fields in an intensive irrigated rice system International Rice Research Institute
Simbahan, Gregorio C..
xvi, 146 leaves : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Yields; Irrigation; Simulation models.
Ano: 2000 URL: http://hdl.handle.net/123456789/495
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Aptidão e potencial de produção de milho em municípios de Minas Gerais. Infoteca-e
PAIXÃO, J. de S.; ANDRADE, C. de L. T. de; SILVA, P. P. G. da; MAGALHÃES, B. G.; MELO, B. F..
A maior parte da produção de milho no Brasil ocorre em regime de sequeiro, tanto na primeira quanto na segunda safra, estando, portanto, sujeita a instabilidades climáticas que podem afetar o rendimento de grãos. Irregularidade no regime de chuvas, que induz estresse hídrico na cultura, é o principal fator responsável pela quebra da produtividade do milho no país. Algumas estratégias de manejo da cultura podem ser empregadas para atenuar este problema, entre as quais a escolha do período de semeadura adequado, preconizado no zoneamento de risco climático do Ministério da Agricultura, Pecuária e Abastecimento (Mapa). As ferramentas computacionais utilizadas no zoneamento necessitam, todavia, serem aprimoradas, principalmente em razão da nova era chamada...
Tipo: Documentos (INFOTECA-E) Palavras-chave: Zea mays; Semeadura; Modelo de simulação; Sowing; Simulation models.
Ano: 2016 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/1056084
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China's Accession to the WTO: What Is at Stake for Agricultural Markets? AgEcon
Fuller, Frank H.; Beghin, John C.; de Cara, Stephane; Fabiosa, Jacinto F.; Fang, Cheng; Matthey, Holger.
We analyze the impact of China's accession to the World Trade Organization on major crop and livestock markets using the FAPRI modeling framework. We incorporate expected changes in consumer income, textile production, and trade policies as exogenous shocks to the baseline model. Following accession, revenues decline in China's livestock, grain, and oilseed industries, while cotton production prospers despite increased cotton imports. Chinese consumers benefit from lower food prices, with vegetable oil, dairy, and meat consumption increasing significantly. Argentina, Brazil, Canada, the European Union, and the United States are the greatest beneficiaries from expanded agricultural trade with China.
Tipo: Working or Discussion Paper Palavras-chave: Accession; Agricultural trade; China; Policy analysis; Simulation models; Trade liberalization; World Trade Organization; International Relations/Trade.
Ano: 2001 URL: http://purl.umn.edu/18522
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Computer simulation of the population dynamics of the yellow stem borer, Scirpophaga incertulas (Walker) International Rice Research Institute
Xia, Jingyuan.
132 l. : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Insect pests; Scirpophaga incertulas; Population dynamics; Simulation models; Mathematical models; Computers.
Ano: 1988 URL: http://hdl.handle.net/123456789/1184
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Delivering the Goods: Scaling out Results of Natural Resource Management Research Ecology and Society
Harrington, Larry; International Maize and Wheat Improvement Center (CIMMYT); l.harrington@cgiar.org; White, Jeffrey; ; j.white@cgiar.org; Grace, Peter; Sinclair Knight Merz, Brisbane, Australia; pgrace@skm.com.au; Hodson, David; ; d.hodson@cgiar.org; Hartkamp, Agnes Dewi; Product Organisation Grains, Seeds and Pulses, The Hague, Netherlands; d.hartkamp@wisint.org; Vaughan, Christopher; CO MET Directorate of Environmental Affairs, Namibia; kit@africaonline.com.na; Meisner, Craig; ; cmeisner@bttb.net.bd.
To help integrated natural resource management (INRM) research "deliver the goods" for many of the world's poor over a large area and in a timely manner, the authors suggest a problem-solving approach that facilitates the scaling out of relevant agricultural practices. They propose seven ways to foster scaling out: (1) develop more attractive practices and technologies through participatory research (2) balance supply-driven approaches with resource user demands, (3) use feedback to redefine the research agenda, (4) encourage support groups and networks for information sharing, (5) facilitate negotiation among stakeholders, (6) inform policy change and institutional development, and (7) make sensible use of information management tools, including models...
Tipo: Peer-Reviewed Reports Palavras-chave: Mexico; South Asia; Southern Africa; Conservation tillage; Diffusion of research; Environments; Geographic information systems; Natural resource management; Participatory research; Scaling out; Simulation models; Technology transfer.
Ano: 2001
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Determining the deficit coefficient as a function of irrigation depth and distribution uniformity AGRIAMBI
Mantovani,Everardo C.; Faccioli,Gregório G.; Leal,Brauliro G.; Costa,Luis C.; Soares,Antônio A.; Freitas,Paulo S. L..
The present study aimed at the development of the water deficit coefficient as a function of the Christiansen uniformity coefficient and relationship between the applied water depth and that required by a given crop, taking into account that the water distribution by the sprinkler follows a normal distribution. Another objective was to compare the experimental results to those obtained through simulation with the Mantovani model. For this, the water deficit coefficients developed in this work were used, as well as the simplified coefficient that takes into account the water distribution by the sprinkler following a uniform distribution, and finally the development of the production functions for the bean crop by using the Mantovani model. The production...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sprinkle; Simulation models; Bean crop.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000300003
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Developing a hydrological model for the Mekong Basin: impacts of basin development on fisheries productivity. AgEcon
Kite, Geoff.
Tipo: Working or Discussion Paper Palavras-chave: Simulation models; Hydrology; River basins; Water resource management; Productivity; Flow; Fisheries; Mapping; Data collection; Computer techniques; Climate; Soil properties; Stream flow; Dams; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2000 URL: http://purl.umn.edu/92781
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Ecological and Social Dynamics in Simple Models of Ecosystem Management Ecology and Society
Carpenter, Stephen R; University of Wisconsin-Madison; srcarpen@wisc.edu; Brock, William; University of Wisconsin; brock@macc.wisc.edu; Hanson, Paul; University of Wisconsin; pchanson@facstaff.wisc.edu.
Simulation models were developed to explore and illustrate dynamics of socioecological systems. The ecosystem is a lake subject to phosphorus pollution. Phosphorus flows from agriculture to upland soils, to surface waters, where it cycles between water and sediments. The ecosystem is multistable, and moves among domains of attraction depending on the history of pollutant inputs. The alternative states yield different economic benefits. Agents form expectations about ecosystem dynamics, markets, and/or the actions of managers, and choose levels of pollutant inputs accordingly. Agents have heterogeneous beliefs and/or access to information. Their aggregate behavior determines the total rate of pollutant input. As the ecosystem changes, agents update their...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive agent models; Adaptive management; Bounded rationality; Ecological economics; Ecosystem oscillations; Integrated models; Lake eutrophication; Nonpoint pollution; Phosphorus cycles; Simulation models; Social-natural systems..
Ano: 1999
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Environmental and Management Constraints on Tourism in Varna Bay, Bulgarian Black Sea Coast Ecology and Society
Moncheva, Snejana; IO-BAS; snejanam@abv.bg; Racheva, Eleonora; IO-BAS; ainsteim@abv.bg; Kamburska, Lyudmila; EC DG-JRC, Institute for Environment and Sustainability; lyudmila.kamburska@jrc.it.
We used the systems approach framework (SAF) to study the conflict between the development of tourism and marine environmental quality in Varna Bay, a critical regional policy issue selected for study after stakeholder consultation. Water quality is of central importance to the tourism industry, as a minimum level of water clarity is required to make the water attractive for swimming and bathing. Rampant development of coastal resorts in Varna Bay has led to water-quality deterioration because the tourism capacity has expanded without concurrent increases in the capacity to collect and treat sewage. We used a numerical model to simulate the Secchi depth (as a proxy for transparency) as a function of the nitrogen loading and total suspended solids. The SAF...
Tipo: Peer-Reviewed Reports Palavras-chave: Black Sea; Coastal tourism; Eutrophication; Simulation models; Systems approach.
Ano: 2012
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Estimating productivity of water at different spatial scales using simulation modeling AgEcon
Droogers, Peter; Kite, Geoff.
A clear understanding of the current water balance is required to explore options for water saving measures. However, measurement of all the terms in the water balance is infeasible in terms of spatial and temporal scale, but hydrological simulation models can fill the gap between measured and required data. For a basin in Western Turkey, simulation modeling at three different scales, field, irrigation scheme and basin scale, was performed to obtain all terms of the water balance. These water balance numbers were used to calculate the Productivity of Water at the three spatial levels distinguished to assess the performance of the systems.
Tipo: Report Palavras-chave: Water resources; Productivity; Simulation models; Water scarcity; Water supply; Water balance; Performance indexes; Indicators; River basins; Cropping systems; Crop yield; Cotton; Hydrology; Economic analysis; Agribusiness; Agricultural Finance; Crop Production/Industries; Environmental Economics and Policy; Production Economics; Productivity Analysis; Research Methods/ Statistical Methods.
Ano: 2001 URL: http://purl.umn.edu/44568
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Evaluación de tres genotipos de cebada maltera en el estado de Hidalgo Colegio de Postgraduados
Gómez Mercado, René.
Los modelos de simulación para establecer el rendimiento de cultivos requieren de información no siempre disponible para cubrir los requerimientos de predicción, que explican de manera teórica los fenómenos que influyen en el rendimiento. La información faltante se refiere al tipo de cultivares (fenología, fisiología y genética) y su interacción con el clima y los suelos. El objetivo del presente estudio fue simular el crecimiento, desarrollo y rendimiento, para evaluar la producción de materia seca y su relación con el rendimiento y determinar diferencias entre genotipos por medio del uso de modelos de simulación dinámica como una herramienta de investigación. La metodología propuesta parte del método de la FAO para estimar el rendimiento con...
Tipo: Tesis Palavras-chave: Materia seca; Modelos de simulación; Hordeum vulgare; Doctorado; Edafología; Dry matter; Simulation models.
Ano: 2008 URL: http://hdl.handle.net/10521/1484
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Evaluating a crop-weed simulation model as a tool for weed management in irrigated transplanted rice (Oryza sativa L.) International Rice Research Institute
Abamu, Franklin Jacob.
174 leaves : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Weeds; Simulation models; Weed control; Nitrogen fertilizers; Irrigation.
Ano: 1995 URL: http://hdl.handle.net/123456789/676
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Evaluation of deployment strategies for resistance in rice to Piricularia grisea by simulation modeling International Rice Research Institute
Yap, Immanuel V..
129 leaves, ill. Thesis (M.S.) -- University of the Philippines at Los Baños, 1994.
Tipo: Thesis Palavras-chave: Magnaporthe grisea; Rice; Disease resistance; Simulation models.
Ano: 1994 URL: http://hdl.handle.net/10269/18
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Evaluation of historic, current and future water demand in the Olifants River Catchment, South Africa AgEcon
McCartney, Matthew P.; Arranz, Roberto.
Water resource development has played a significant role in the expansion of agriculture and industry in the Olifants River Catchment. However, currently water deficit is one of the major constraints hampering development in the catchment; both the mining and agricultural sectors are producing below optimal levels because of their reliance on insufficient supplies. In this study, the Water Evaluation and Planning (WEAP) model was used to evaluate scenarios of historic, current and future water demand in the catchment. For each scenario, the WEAP model was used to simulate demand in five different sectors (rural, urban, mining, commercial forestry and irrigation) over a 70-year period of varying rainfall and hydrology. Levels of assured supply were...
Tipo: Report Palavras-chave: River basins; Catchment areas; Water resources development; Water demand; Water allocation; Simulation models; Calibrations; Water use; Irrigation water; Domestic water; Ecology; South Africa; Olifants River Catchment; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Labor and Human Capital; Land Economics/Use; Production Economics; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007 URL: http://purl.umn.edu/61095
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Evaluation of historic, current and future water demand in the Olifants River Catchment, South Africa. AgEcon
McCartney, Matthew P.; Arranz, Roberto.
Tipo: Report Palavras-chave: River basins; Catchment areas; Water resources development; Water demand; Water allocation; Simulation models; Calibrations; Water use; Irrigation water; Domestic water; Ecology; South Africa; Olifants River Catchment; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/57026
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Exposure of Bangladeshi rice farmers to early flood risk International Rice Research Institute
Shankar, B..
p.60-61
Palavras-chave: Farmers; Floods; Natural disasters; Risk assessment; Simulation models; Altitude; Geographical information systems; Precision agriculture; Bangladesh.
Ano: 2003 URL: http://hdl.handle.net/123456789/1273
Registros recuperados: 45
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