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Índice de productividad total de los factores del sector agrícola Mexicano Colegio de Postgraduados
Sandoval Ceballos, José Alfredo.
El crecimiento de la productividad es un indicador clave para una economía. La productividad total de los factores (PTF) es una proporción del total de los productos respecto al total de los factores de la producción. Aquí se utiliza el método de números índice para medir la PTF en el sector agropecuario. En las últimas dos décadas ha habido cambios importantes en la economía mexicana (por ejemplo: la apertura comercial, la modificación del Artículo 27 Constitucional, entre otras) que afectan directamente las condiciones de la producción agrícola del país y por ende afectan también el comportamiento de la productividad de los cultivos. El objetivo principal de la presente investigación es medir el índice de PTF del sector agrícola mexicano,...
Tipo: Tesis Palavras-chave: Productividad total de los factores (PTF); Índice Törnqvist; Sector agrícola; México; Maestría; Economía; Total Factor Productivity (TFP); Törnqvist index; Agriculture.
Ano: 2008 URL: http://hdl.handle.net/10521/1526
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Alteración de la fertilidad del suelo atribuible al cambio climático y su impacto sobre la productividad de café en el Estado de Veracruz, México. Colegio de Postgraduados
Brigido Morales, Juan Gabriel.
Todas las investigaciones sobre el cambio climático global indican que éste se ve fortalecido con el incremento en la concentración de gases, principalmente CO2. También se ha encontrado que este incremento pueden intensificar las condiciones climáticas medias normales dentro de las que históricamente se ha dado el desarrollo de la agricultura por lo que ésta se vuelve vulnerable, siendo afectada su productividad. El objetivo principal del presente trabajo fue estimar el papel de la posible modificación del índice de fertilidad del suelo debido al cambio climático en los cálculos de la productividad del cultivo de café (Coffea arabica L.) para 20 municipios cafetaleros del estado de Veracruz utilizando 3 escenarios de cambio climático para México...
Palavras-chave: Vulnerabilidad; Agricultura; Índice hidrotérmico local; Índice integral de fertilidad del suelo; Café; Escenarios de cambio climático; Vulnerability; Agriculture; Local hydrothermal index; Integral soil fertility index; Coffee; Climate change scenarios; Hidrociencias; Maestría.
Ano: 2014 URL: http://hdl.handle.net/10521/2219
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Efecto del subprograma de apoyo a los proyectos de inversión rural (PAPIR) en productores que recibieron bienes de capital durante el periodo 2002-2007 en la Región Libres, Puebla, México. Colegio de Postgraduados
Soto Reyes, Vianey.
El Subprograma de Apoyo a los Proyectos de Inversión Rural (PAPIR), fue un programa diseñado para fomentar la inversión en bienes de capital de la población rural elegible a través del apoyo para la puesta en marcha de proyectos productivos que posibiliten la aplicación de tecnologías apropiadas, la reconversión productiva, el acopio, acondicionamiento y transformación para fortalecer la comercialización de la producción primaria, la generación de empleo rural y de servicios, así como su posicionamiento en los mercados. El objetivo del estudio es determinar el efecto que tuvo el bien de capital recibido por los productores sobre sus actividades productivas agrícolas, pecuarias o de servicios. El sitio de estudio estuvo integrado por 8 municipios que...
Palavras-chave: Agricultura; Beneficiario; Campesino; Prácticas medioambientales; Tipo de apoyo; Agriculture; Beneficiary; Environmental practices; Farmer; Type of support; Maestría; Estrategias para el Desarrollo Agrícola Regional; EDAR.
Ano: 2011 URL: http://hdl.handle.net/10521/611
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Migración internacional y mercado de tierras : un estudio en 4 ejidos de Valle de Santiago, Guanajuato, México. Colegio de Postgraduados
León Andrade, Marilu.
En el presente trabajo se aborda el estudio de la relación que se establece entre los procesos migratorios internacionales con el mercado de tierras en 4 organizaciones ejidales de Valle de Santiago, Guanajuato. Se plantea a lo largo de esta investigación que existe una relación entre la migración hacia los Estados Unidos y el desarrollo histórico y social de las organizaciones ejidales, la renta y/o venta y la valoración de las tierras entre las generaciones de ejidatarios y sus familias. El marco teórico conceptual se fundamentó en teorías y enfoques teóricos en torno al fenómeno migratorio como las redes sociales de migración y categorías socioeconómicas, tales como: ejidatarios, crisis agrícola y estructura agraria. Finalmente se concluyó que el...
Palavras-chave: Agricultura; Ejidos; Mercado de tierras; Migración internacional; Redes sociales; Agriculture; International migration; Land market; Social networks; Estrategias para el Desarrollo Agrícola Regional; EDAR; Doctorado.
Ano: 2013 URL: http://hdl.handle.net/10521/2197
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On sustainability of human ecological niche construction Ecology and Society
Tipo: Peer-Reviewed Response Palavras-chave: Agriculture; Human health; Niche theory.
Ano: 2014
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Biocultural Refugia: Combating the Erosion of Diversity in Landscapes of Food Production Ecology and Society
Barthel, Stephan; Stockholm Resilience Centre, Stockholm University, Sweden; Department of History, Stockholm University, Stockholm, Sweden; stephan.barthel@historia.su.se; Crumley, Carole L.; Stockholm Resilience Centre, Stockholm University, Sweden; Department of Archaeology and Ancient History, Uppsala University, Uppsala, Sweden; Swedish Biodiversity Centre, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden; crumley@live.unc.edu; Svedin, Uno; Stockholm Resilience Centre, Stockholm University, Sweden ; uno.svedin@gmail.com.
Tipo: Peer-Reviewed article Palavras-chave: Agriculture; Biocultural refugia; Diversity; Ecosystem restoration; Resilience; Small holders; Stewardship.
Ano: 2013
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Economic Factors Affecting Diversified Farming Systems Ecology and Society
Bowman, Maria S.; Department of Agricultural and Resource Economics, University of California, Berkeley; maria.s.bowman@berkeley.edu; Zilberman, David; Department of Agricultural and Resource Economics, University of California, Berkeley; zilber11@berkeley.edu.
Tipo: Peer-Reviewed Synthesis Palavras-chave: Agriculture; Diversified farming systems; Economics.
Ano: 2013
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Evaluating Today's Landscape Multifunctionality and Providing an Alternative Future: A Normative Scenario Approach Ecology and Society
Waldhardt, Rainer; Landscape Ecology and Landscape Planning, Justus-Liebig-University Giessen; rainer.waldhardt@umwelt.uni-giessen.de; Bach, Martin; Resources Management, Justus-Liebig-University Giessen;; Breuer, Lutz; Resources Management, Justus-Liebig-University Giessen;; Frede, Hans-Georg; Resources Management, Justus-Liebig-University Giessen;; Ginzler, Oliver; Landscape Ecology and Landscape Planning, Justus-Liebig-University Giessen;; Gottschalk, Thomas; Animal Ecology, Justus-Liebig-University Giessen;; Julich, Stefan; Resources Management, Justus-Liebig-University Giessen;; Krumpholz, Matthias; Agribusiness Management, Justus-Liebig-University Giessen;; Kuhlmann, Friedrich; Agribusiness Management, Justus-Liebig-University Giessen;; Otte, Annette; Landscape Ecology and Landscape Planning, Justus-Liebig-University Giessen;; Reger, Birgit; Landscape Ecology and Landscape Planning, Justus-Liebig-University Giessen;; Reiher, Wolfgang; Resources Management, Justus-Liebig-University Giessen;; Schmitz, Kim; Agricultural and Development Policy, Justus-Liebig-University Giessen;; Schmitz, P. Michael; Agricultural and Development Policy, Justus-Liebig-University Giessen;; Sheridan, Patrick; Agribusiness Management, Justus-Liebig-University Giessen;; Simmering, Dietmar; Landscape Ecology and Landscape Planning, Justus-Liebig-University Giessen;; Weist, Cornelia; Biometry and Population Genetics, Justus-Liebig-University Giessen;; Wolters, Volkmar; Animal Ecology, Justus-Liebig-University Giessen;.
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Ecosystem services; Germany; Modeling; Sustainability.
Ano: 2010
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Quantifying the Human Appropriation of Fresh Water by African Agriculture Ecology and Society
Alcamo, Joseph; Center for Environmental Systems Research, University of Kassel; alcamo@usf.uni-kassel.de.
Tipo: Peer-Reviewed Reports Palavras-chave: Africa; Agriculture; Blue water; Green water; Hydrological modeling; LandSHIFT; Land-use modeling; WaterGAP.
Ano: 2009
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Tweak, Adapt, or Transform: Policy Scenarios in Response to Emerging Bioenergy Markets in the U.S. Corn Belt Ecology and Society
Atwell, Ryan C; Iowa State University, Department of Natural Resource Ecology and Management; ryancardiffatwell@gmail.com; Schulte, Lisa A; Iowa State University, Department of Natural Resource Ecology and Management; lschulte@iastate.edu; Westphal, Lynne M; U.S. Forest Service, Northern Research Station; lwestphal@fs.fed.us.
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Complexity; Ecosystem services; Iowa; Participatory; Perennials; Resilience; Scale; Social-ecological systems.
Ano: 2011
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Optimizing nitrogen rates in the midwestern United States for maximum ecosystem value Ecology and Society
Ewing, Patrick M; University of Minnesota, Department of Agronomy and Plant Genetics ; ewing069@umn.edu; Runck, Bryan C; University of Minnesota, Department of Geography, Environment and Society; runck014@umn.edu.
The importance of corn production to the midwestern United States cannot be overestimated. However, high production requires high nitrogen fertilization, which carries costs to environmental services such as water quality. Therefore, a trade-off exists between the production of corn yield and water quality. We used the Groundwater Vulnerability Assessment for Shallow depths and Crop Environment Resource Synthesis-Maize models to investigate the nature of this trade-off while testing the Simple Analytic Framework trade-offs featured in this Special Feature. First, we estimated the current levels of yield and water quality production in northeastern Iowa and southern Minnesota at the 1-square-kilometer, county, and regional scales. We then constructed an...
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Agroecology; Corn belt; DSSAT; Fertilization rate; Frontier analysis; Groundwater nitrate; GWAVA-S; Land use; Nitrogen; Rotation; Row crops; Simple Analytics Framework; Yield.
Ano: 2015
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Syndromes of Production in Agriculture: Prospects for Social-Ecological Regime Change Ecology and Society
Vandermeer, John H.; Department of Ecology and Evolutionary Biology, University of Michigan; jvander@umich.edu; Perfecto, Ivette; School of Natural Resources, University of Michigan; perfecto@umich.edu.
Tipo: Peer-Reviewed Insight Palavras-chave: Agriculture; Production syndromes; Regime change; Stability.
Ano: 2012
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Scope and precision of sustainability assessment approaches to food systems Ecology and Society
Schader, Christian; Research Institute of Organic Agriculture (FiBL); christian.schader@fibl.org; Grenz, Jan; Bern University of Applied Sciences; jan.grenz@bfh.ch; Meier, Matthias S; Research Institute of Organic Agriculture (FiBL); matthias.meier@fibl.org; Stolze, Matthias; Research Institute of Organic Agriculture (FiBL); matthias.stolze@fibl.org.
With sustainability within food systems becoming an increasingly important issue, several approaches that claim to assess the sustainability of farms, farming systems, and supply chains have been developed. Looking more closely at these sustainability impact assessment approaches, we discerned considerable differences between them in terms of scope, the level of assessment, and the precision of indicators used for impact assessment. Our aim was to classify and analyze a range of available sustainability impact assessment approaches with respect to scope and precision. From a total of 35 sustainability assessment approaches, we selected 6 for a detailed comparison. From our analysis, we concluded that there are 3 different types of trade-offs in these...
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Classification; Life cycle assessment; SAFA guidelines; Sustainability assessment; Typology.
Ano: 2014
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Genetically Modified Organisms at the Crossroads: Comments on "Genetically Modified Crops: Risks and Promise" by Gordon Conway Ecology and Society
Walker, Brian; CSIRO Sustainable Ecosystems; Brian.Walker@csiro.au; Lonsdale, Mark; CSIRO Entomology; mark.lonsdale@ento.csiro.au.
Tipo: Peer-Reviewed Reports Palavras-chave: GMO technology; Agriculture; Ecosystem effects; Genetically modified organisms; Indirect effects; Introduced species; Risk analysis; Risk assessment.
Ano: 2000
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Globalization and Land-Use Transitions in Latin America Ecology and Society
Grau, H. Ricardo; Universidad Nacional de Tucuman; CONICET; chilograu@gmail.com; Aide, Mitchell; University of Puerto Rico; tmaide@yahoo.com.
Current socioeconomic drivers of land-use change associated with globalization are producing two contrasting land-use trends in Latin America. Increasing global food demand (particularly in Southeast Asia) accelerates deforestation in areas suitable for modern agriculture (e.g., soybean), severely threatening ecosystems, such as Amazonian rain forests, dry forests, and subtropical grasslands. Additionally, in the coming decades, demand for biofuels may become an emerging threat. In contrast, high yields in modern agricultural systems and rural–urban migration coupled with remittances promote the abandonment of marginal agricultural lands, thus favoring ecosystem recovery on mountains, deserts, and areas of poor soils, while improving human...
Tipo: Peer-Reviewed Insight Palavras-chave: Agriculture; Deforestation; Ecological transition; Forest transition; Globalization; Land-use change; Latin America.
Ano: 2008
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Sustainability of Human Ecological Niche Construction Ecology and Society
Isbell, Forest; Department of Ecology, Evolution & Behavior, University of Minnesota Twin Cities, Saint Paul, Minnesota; forest.isbell@gmail.com; Loreau, Michel; Centre for Biodiversity Theory and Modelling, Experimental Ecology Station, Centre National de la Recherche Scientifique, Moulis, France; michel.loreau@ecoex-moulis.cnrs.fr.
Humans influence and depend on natural systems worldwide, creating complex societal-ecological feedbacks that make it difficult to assess the long-term sustainability of contemporary human activities. We use ecological niche theory to consider the short-term (transient) and long-term (equilibrium) effects of improvements in health, agriculture, or efficiency on the abundances of humans, our plant and animal resources, and our natural enemies. We also consider special cases of our model where humans shift to a completely vegetarian diet, or completely eradicate natural enemies. We find that although combinations of health, agriculture, and efficiency improvements tend to support more people and plant resources, they also result in more natural enemies and...
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Human health; Niche theory.
Ano: 2014
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Historical, Demographic, and Economic Correlates of Land-Use Change in the Republic of Panama Ecology and Society
Wright, Stuart Joseph; Smithsonian Tropical Research Institute; wrightj@si.edu; Samaniego, Mirna Julieta; Smithsonian Tropical Research Institute; samaniem@si.edu.
Tipo: Peer-Reviewed Reports Palavras-chave: Agricultural income; Agriculture; Cattle; Deforestation; Forest transition; Land cover; Pasture; Plantation; Reforestation; Tropical forest.
Ano: 2008
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A Classification of Collaborative Management Methods Ecology and Society
Blumenthal, Dana M; University of Minnesota; dblumenthal@npa.ars.usda.gov; Jannink, Jean-Luc; University of Minnesota; jjannink@iastate.edu.
Collaboration among multiple stakeholders can be crucial to the success of natural resource management. In recent years, a wide variety of methods have been developed to facilitate such collaboration. Because these methods are relatively new and come from different disciplines, little attention has been paid to drawing comparisons among them. Thus, it is very difficult for potential users to sort through the increasingly large literature regarding such methods. We suggest the use of a consistent framework for comparing collaborative management methods, and develop such a framework based on five criteria: participation, institutional analysis, simplification of the natural resource, spatial scale, and stages in the process of natural resource management. We...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive management; Agriculture; Agroecosystem analysis; Collaboration; Ecosystem management; Natural resource management; Participatory rural appraisal; Rapid rural appraisal; Soft systems analysis.
Ano: 2000
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Assessing the Impact of Integrated Natural Resource Management: Challenges and Experiences Ecology and Society
White, Douglas C; Centro Internacional de Agricultura Tropical;.
Assessing the impact of integrated natural resource management (INRM) research poses a challenge to scientists. The complexity of INRM interventions requires a more holistic approach to impact assessment, beyond the plot and farm levels and beyond traditional analysis of economic returns. Impact assessment for INRM combines the traditional "what" and "where" factors of economic and environmental priorities with newer "who" and "how" aspects of social actors and institutions. This paper presents an analytical framework and methodology for assessing the impact of INRM. A key feature of the proposed methodology is that it starts with a detailed planning process that develops a well-defined, shared, and holistic strategy to achieve development impact. This...
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Impact assessment; Integrated natural resource management; Monitoring and evaluation; Natural resources; Sustainable rural livelihoods.
Ano: 2001
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Farmers’ knowledge and use of soil fauna in agriculture: a worldwide review Ecology and Society
Pauli, Natasha; School of Earth and Environment, The University of Western Australia, Crawley, Australia; natasha.pauli@uwa.edu.au; Abbott, Lynette K; School of Earth and Environment, The University of Western Australia, Crawley, Australia; lynette.abbott@uwa.edu.au.
General knowledge of the small, invisible, or hidden organisms that make soil one of the most biodiverse habitats on Earth is thought to be scarce, despite their importance in food systems and agricultural production. We provide the first worldwide review of high-quality research that reports on farmers’ knowledge of soil organisms in agriculture. The depth of farmers’ knowledge varied; some farming communities held detailed local taxonomies and observations of soil biota, or used soil biological activity as indicators of soil fertility, while others were largely unaware of soil fauna. Elicitation of soil biota knowledge was often incidental to the main research goal in many of the reviewed studies. Farmers are rarely deliberately or...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Agriculture; Ethnoecology; Ethnopedology; Farmer knowledge; Local knowledge; Soil biota.
Ano: 2016
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