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| Registros recuperados: 35 | |
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| 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... |
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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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| 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/infoteca/handle/doc/1056084 |
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| 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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| Akinbile, Christopher Oluwakunmi. |
| This study estimated crop water requirements using CROPWAT while AQUACROP and CERES models evaluated performance in simulating biomass and grain yield of upland rice’s response to different irrigation schedule. NERICA 4 was subjected to five treatment given as: full (100%ET), good (80%ET), medium (60%ET), average (40%ET), and low (20%ET) and three replicates in a randomized block design. It was planted at the farmyard of the International Institute of Tropical Agriculture (IITA) Ibadan, Nigeria for two seasons 2015 and 2016 and the results of the first season was used in model calibration while second season’s result was used in validation. Biomass and grain yields values were obtained and compared with simulated values from AQUACROP and CERES and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NERICA 4; Water requirements; Yield; Simulation models; Irrigation schedule.. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5636 |
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| 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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| 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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| 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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| PESSOA, M. C. P. Y.; GOMES, M. A. F.; SOUZA, M. D. de; CERDEIRA, A. L.; NEVES, M. C.; NICOLELLA, G.. |
| Este trabalho teve por objetivo um estudo de simulação, utilizando o CMLS-94, em área de agricultura intensiva de cana-de-açúcar, localizada na microbacia do córrego Espraiado em Ribeirão Preto (SP), de importância internacional, dada a presença do Aquífero Botucatu (Guarani). Os dados referentes a cultura de cana-de-açúcar tipo soqueira, predominante na área, aos principais tipos de solo na área estudada, quais sejam Latossolo Roxo (LR), Latossolo Vermelho-Escuro (LE) e Areia Quartzosa (AQ), foram incorporados as bases de dados do CMLS-94, assim como a informação do nome do arquivo contendo dados climáticos diários de Ribeirão Preto (SP) (período 1986-1989). Os herbicidas utilizados foram atrazina, tebuthiuron e diuron, por serem os mais usados na área de... |
| Tipo: Folhetos |
Palavras-chave: Agricultura intensiva; Águas subetrrâneas; Lençoal freático; Herbicida; Simulação; Qualidade da água; Agrotóxico; Solo; Contaminação; Cana de açúcar; Atrazina; Herbicides; Environmental fate; Simulation models; Diuron; Tebuthiuron. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/13121 |
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| 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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| Odwori, P.O.; Mapelu, M.Z.; Odhiambo, Mark O.; Nyangweso, P.M.. |
| Simulation models have been used successfully to forecast productivity of cropping systems under various weather, management and policy scenarios. These models have helped farmers make efficient resource allocation decisions. However, in Kenya simulation models have not been used extensively and more specifically in modeling maize cropping system. The study aimed at forecasting productivity and profitability of maize cropping system in Uasin Gishu district, Kenya. Both primary and secondary data were used. Both time series and cross-sectional data for variables of interest were collected and complemented by a survey of 20 maize farmers who were systematically selected to verify information obtained from secondary sources. Cropping Systems simulation model... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Forecasting; Yields; Profits; Maize cropping system; Simulation models; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/97080 |
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| Registros recuperados: 35 | |
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