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Liepins, Ruth. ""Women in agriculture" : a geography of Australian agricultural activism /". Connect to thesis, 1996. http://eprints.unimelb.edu.au/archive/00000215.
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Smith, J. T. "Commercial agriculture as a curriculum source for agricultural education". Thesis, University of Wolverhampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379482.
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Camargo, Jose Marangoni. "Relações de trabalho na agricultura paulista no periodo recente". [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/285483.
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Orientador: Angela Antonia KageyamaTese (dooutorado) - Universidade Estadual de Campinas, Insituto de Economia
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Resumo: Esta pesquisa tem como objetivos principais analisar as transformações técnico-produtivas ocorridas na agricultura paulista e os seus impactos sobre o emprego e as condições socioeconômicas da população ocupada no setor. O nível de emprego direto gerado pelas atividades agrícolas depende em grande medida da área cultivada, da composição das culturas e do desempenho da safra agrícola, sobretudo no curto prazo. O estágio tecnológico em que se encontram as culturas também é outra variável que afeta a ocupação agrícola. No caso específico de São Paulo, dado o esgotamento precoce de sua fronteira agrícola, a evolução da ocupação agrícola tem sido influenciada principalmente pelas mudanças da base técnica dos processos produtivos adotados pelos estabelecimentos agrícolas. Entre o início da década de 70 e meados da década atual, a agricultura paulista eliminou quase 700 mil postos de trabalho, o que representou uma redução de quase 40% da ocupação agrícola neste período. Observa-se também uma tendência de declínio da mão-de-obra residente nas propriedades, na medida em que quase 60% dos ocupados na agricultura paulista já residem fora das propriedades rurais em que exercem seu trabalho. Os assalariados temporários, que nos anos 80 tinham uma participação de 22% do total da população ocupada, passam a representar 19% em 2004. Concomitantemente, o novo ciclo de inovação tecnológica em curso na agricultura paulista a partir dos anos 90, apoiada, sobretudo na intensificação da mecanização em todas as fases do processo produtivo, tende a levar a uma preferência crescente por trabalhadores assalariados permanentes. Analisa-se também o comportamento da ocupação agrícola para as diferentes regiões do estado de São Paulo. Os dados sobre a ocupação agrícola para os anos 90 apontam que, apesar de todas as regiões apresentarem uma redução do emprego nesse período, os efeitos combinados de fatores como o grau de tecnificação das culturas, as mudanças dos indicadores desse nível de modernização e alterações nas áreas ou na composição das culturas, incidiram de forma diferenciada sobre as várias regiões do estado
Abstract: The main purpose of this study is to analyze the changes in production methods that have taken place in agriculture in São Paulo State and their impact both on jobs and the socio-economic conditions of the workers in this sector. The rate of direct employment generated by agricultural activities largely depends on the cultivated area, the crops grown and the abundance of the harvest, especially in the short term. The technological level of the agricultural activities is another factor that affects the numbers employed on the land. In the specific case of São Paulo, given the early exhaustion of the rural frontier, the evolving pattern of agricultural work has been influenced mainly by the changing technical basis of the production methods adopted by agricultural units. From the beginning of the 1970s until the middle of the present decade, agriculture in São Paulo lost nearly 700,000 jobs, representing a nearly 40% reduction in rural employment in the period. There is also a tendency for the resident work force to decline, since nearly 60% of those working on the land in São Paulo already live away from the rural properties where they do their work. The seasonal workers, who represented 22% of the total working population during the 1980s, fell to 19% in 2004. At the same time, the new cycle of technological innovation in progress in the agricultural sector in São Paulo since the 1990s, above all in the intensification of mechanization at all stages of the productive process, tends to favor a growing preference for permanent salaried workers. The profile of agricultural work in the different regions of São Paulo State is also analyzed. The numbers occupied on the land during the 1990s indicate that, while all regions suffered a reduction in the level of employment in that period, the combined effects of factors such as the degree of mechanization of cultivation, changes in the indicators of that level of modernization and alterations in the area under cultivation or type of crops had affected of differentiated form the various regions of the state
Tese (dooutorado) - Universida
Política Social
Doutor em Ciências Econômicas
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Maiato, Adelaide Graça TChacussuñgama. "O papel da agricultura de conservação na luta contra a erosão do solo em particular em Angola". Master's thesis, Universidade de Évora, 2016. http://hdl.handle.net/10174/19167.
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A agricultura de conservação, conseguindo reduzir as perdas de solo por erosão e aumentando o seu teor em matéria orgânica, permite aos agricultores produzirem mais alimentos com menos trabalho. Oferece-lhes uma possibilidade de melhorar a sua qualidade de vida. Várias abordagens sobre agricultura de conservação do solo, incluindo rotação e consorciação de culturas, são componentes deste sistema aplicável a diferentes níveis. A sementeira direta e o menor distúrbio de solo, são princípios primordiais da conservação do solo, fornecem benefícios direitos para a agricultura e o meio ambiente, questões da maior relevância para a agricultura Angolana, apesar da pouca importância que atualmente lhes é dedicada. Logo, é preciso uma conversão e transição de tecnologias e técnicas para implementar a agricultura de conservação e o controle da erosão dos solos no país. As técnicas de conservação utilizadas pelos pequenos e grandes produtores, embora sejam bem-intencionadas, não oferecem a proteção contra a erosão do solo e a conservação da água. Tanto as entidades políticas, como o Programa de Acão do Ministério da Agricultura e do Desenvolvimento Rural (MINADER) e os agricultores angolanos devem entender a importância da agricultura de conservação para a segurança alimentar e dar continuidade para as gerações futuras. Não basta a reformulação e consolidação dos objetivos traçados no período de 2009 a 2013, sem que haja a aplicação prática. Portanto, para sair do atual conceito oficial de agricultura tradicional/convencional e optar para agricultura capaz de responder às necessidades de Angola é necessário seguir modelos semelhantes aos desenvolvidos por países tropicais de condições naturais semelhantes às de Angola; The role of conservation agriculture in the fight against soil erosion particularly in Angola ABSTRACT: Conservation agriculture, managed to reduce soil losses by erosion and to increase its content of organic matter, allow farmers to produce more food with less work. It offers them a chance to improve their quality of life. Several approaches to soil conservation agriculture, including rotation and intercropping, are components of this system applicable to different levels. Direct sowing and less soil disturbance, are key principles of soil conservation providiy benefits for agriculture and the environment, issues of great importance for the Angolan agriculture, in spite of the little importance that is currently dedicated to them. Therefore, we need a conversion and transition technologies and techniques to implement conservation agriculture and soil erosion control in the country. Conservation techniques used by small and large producers, although well-intentioned, do not offer protection against soil erosion and water conservation. Both political entities, such as the Program of Action of the Ministry of Agriculture and Rural Development (MINADER) and Angolan farmers should understand the importance of conservation agriculture for food security and continuity for future generations. Not just the redesign and consolidation of the objectives outlined in the period 2009 to 2013, without practical application. Therefore, to exit the current official concept of traditional / conventional farming and opt for agriculture able to meet the needs of Angola is necessary to follow models similar to those developed by tropical countries of natural conditions similar to Angola.
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Glenna, Leland L. "On becoming ecologically rational : a social and environmental critque of agriculture /". free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841142.
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Lappas, N. "Agricultural co-operatives and changes in Greek agriculture since 1949". Thesis, University of Bradford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378116.
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Window, Marc. "Security in Precision Agriculture : Vulnerabilities and risks of agricultural systems". Thesis, Luleå tekniska universitet, Datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74309.
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Delgado-Hernández, Eduardo José. "Level of involvement in sustainable agriculture activities among agricultural researchers in Venezuela /". The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487951595500436.
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Kiriakopoulos, Nektarios. "Science and technolology : the case of Greek agriculture and agricultural industry". Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401423.
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Alia, Didier Y. "AGRICULTURAL INPUT INTENSIFICATION, PRODUCTIVITY GROWTH, AND THE TRANSFORMATION OF AFRICAN AGRICULTURE". UKnowledge, 2017. http://uknowledge.uky.edu/agecon_etds/59.
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This dissertation studies agricultural input intensification, defined as the increased use of modern inputs such as hybrid seeds, mineral fertilizer, herbicide, and pesticide in African agriculture. It also analyses the potential of this intensification to accelerate productivity growth and tests the effectiveness of two policies, input subsidies and land reforms, in promoting it and consequently in increasing crop yield. In the first essay, we argue that to create the conditions for the emergence of a green revolution in Africa, modern agricultural technologies have to be adopted as a package, not in a piecemeal fashion. This argument is consistent with a conceptual framework that we develop to illustrate the importance of harnessing strategic complementarities among agricultural technologies by adopting them simultaneously rather than sequentially. Based on this framework, we propose a methodology to estimate an index to measure agricultural input intensification in its many dimensions. The index provides a simple and intuitive measure to quantify joint adoption of several inputs and compare it across plots, crops, farmers, and regions. Applying this methodology to maize producers in Burkina Faso and Tanzania, we show that our estimated index is a valid measure of joint input adoption and effectively captures the relative importance of each input as well as the number of different inputs adopted. Using the estimated index, we find that simultaneous adoption of modern inputs in Burkina Faso and Tanzania is limited but not rare. Most importantly, we find that the impact of the adoption of individual modern input on yield is increasing with the level of intensification for others.
In the subsequent two essays, we assess the effectiveness of government’s direct intervention through input subsidies and indirect intervention through land reforms in promoting agricultural input intensification and increasing productivity. Our empirical analyses focus on Burkina Faso, a country that has recently implemented a fertilizer subsidy program and is undertaking profound land reforms to improve land tenure security and land transferability among households. The second essay tests the hypothesis that subsidizing only one input might promote or discourage the use of other inputs. We find that fertilizer subsidy for maize farmers in Burkina Faso crowds in the use of hybrid seeds and crop protection chemicals, but discourages the use of manure. The last essay assesses whether the development of rural land rental markets can facilitate land transferability among farmers and increase input intensification and productivity. The findings suggest that land rental transfers land from less talented or committed farmers to the more able but have minimal impact on input intensification. However, our results show that land renters are more productive and better farm managers. These results suggest that the short-term gains from policies that foster the development of land rental markets in Burkina Faso, and more generally Africa, will likely be in term of efficiency rather than widespread adoption of modern agricultural technologies.
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Rizer, Lindsey, e Lindsey Rizer. "The Agriculture Taste Regime and College Student Interpretations of Agricultural Production Information". Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/625315.
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The introduction of taste regimes into the agriculture literacy and communications literature is explored and discussed in this study. I analyze how college students interpret taste regime indicators (interpretations, personal view alignment, personal action) influence their perceptions of agriculture food production information. More specifically, I look at how media information effects college students’ interpretations of these taste regime indicators. Data were collected from a convenience sample of undergraduate students at a large research-intensive university who responded to an electronic questionnaire developed specifically for this study. Findings indicate that the college students involved in this study have little to no defined opinion between large-scale and alternative agriculture. This indicates that the agriculture taste regime is not taking the general populations beliefs and preferences into consideration when developing campaigns. Recommendations for large-scale and alternative campaigns are to develop more objective campaigns and for the general population become change agents forcing the agriculture taste regime to take their beliefs and preferences into consideration.
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Hoover, Brittany Alexandria. "Factors That Influence How Participants of Virginia's Governor's School for Agriculture Think About, Perceive, and Engage With Agriculture and Agricultural Careers". Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97951.
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The world is facing significant challenges as a result of societal practices. Many of those challenges are agricultural in nature and include worldwide food insecurity, intensified greenhouse gas emissions resulting in climate change, major losses in biodiversity, substantial pressure on natural resources, and increasingly antimicrobial-resistant pests and diseases. To address these challenges, the workforce of the agricultural system must continue improving, collaborating, innovating, and transforming at a global scale. The diversity of agricultural challenges calls for a diverse workforce with science skills as well as cultural competencies.
Agricultural educators and practitioners are consistently concerned with strengthening the relationship of youth and agricultural career choice. The field of agricultural education is also working to ensure that youth who choose agriculture have the knowledge, skills, and competencies necessary to address agricultural challenges. However, youth have steadily chosen careers outside of agriculture, leaving thousands of jobs available.
Researchers have explored many reasons why youth may not choose agriculture, though few have considered aspects of identity or have explored factors that impact perceptions and thoughts of agriculture in depth. The overall purpose of this research was to explore how aspects of identity, including occupational identity status, inform agricultural career interest and choice; and to understand youth perceptions and thoughts of agriculture within a four-week agricultural education program. The purpose was achieved using research questions and objectives for each individual study. Data were collected using inventories, surveys, group interviews, and blog post assignments to describe participants. Data analysis included thematic analysis and descriptive statistical analysis. Findings show that the participants often had a more negative perception of agriculture prior to the program and expanded their view of agriculture after learning more about the industry. There are many factors that shape perceptions of agriculture, including identity characteristics, learning experiences, and contextual factors. The findings have implications for the field of agricultural education and the entire agricultural industry. At the conclusion of each study within this research, recommendations for agricultural educators, practitioners, and researchers were made. The recommendations include developing and implementing agricultural education programs that serve underrepresented populations in agriculture and conducting research to investigate ill-explored areas that emerged as findings from the research.Doctor of Philosophy
The world is facing many problems in the agricultural industry. These problems relate to food, land, and climate – amongst others. These problems must be addressed; and to do so, there must be a workforce in the agriculture industry that is skilled and competent. Agricultural educators and practitioners are tasked with preparing the agricultural workforce and have a continuous mission to encourage youth to choose agricultural careers. A problem is that youth are largely not choosing agricultural careers, and many jobs in agriculture go unfilled. Researchers have explored reasons why youth largely choose careers in other industries; the reasons include different factors such as opinions of parents and the exposure to agricultural careers. This research explores additional reasons why youth may not choose a career in agriculture and explores previously known reasons in the context of the 2019 Virginia's Governor's School for Agriculture program. The overall purpose of this research is to explore additional reasons for career choice in agriculture, including aspects of identity. The overall purpose of this research was also to explore youths' perceptions and thoughts of agriculture in-depth. The purpose was achieved by asking a series of research questions and by stating a series of objectives. The research questions and objectives were addressed using data collection methods of group interviews, blog post assignments, inventories, and surveys. The data that was collected was analyzed using thematic analysis and descriptive statistical analysis. The findings from this research show that there are many reasons why youth who were participants of the 2019 Virginia's Governor's School for Agriculture program think about and perceive agriculture. The reasons relate to identity characteristics, learning experiences, and contextual factors. These reasons also influence how youth choose to be involved in agriculture. The findings have implications for the field of agricultural education and the entire agricultural industry. For each article within this research, recommendations for agricultural educators, practitioners, and researchers were made. These include expanding the reach of agricultural education and further exploring findings that emerged from the research.
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Pereira, Gilberto Alves. "Sistema experimental de monitoramento e controle para casas de vegetação baseado em redes de controle distribuído LonWorks". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-09062006-091835/.
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O cultivo protegido em casas de vegetação possibilita produção vegetal de maior qualidade e em qualquer época do ano. A tecnologia tem papel preponderante no controle desses ambientes, embora nem sempre seja satisfatoriamente empregada. Soluções convencionais, como as que utilizam Controladores Lógicos Programáveis, ou sistemas com tecnologia proprietária predominam nas soluções oferecidas. A evolução da tecnologia de comunicação vem possibilitando a difusão do uso da tecnologia de redes de computadores em outras aplicações, as chamadas redes de controle, possibilitando a mudança de paradigmas na concepção de sistemas de monitoramento e controle. Os sistemas com arquitetura centralizada tendem a dar lugar aos com arquitetura distribuída, e o uso da Internet possibilita a supervisão e operação de qualquer lugar. Este trabalho discute a adoção da tecnologia de redes de controle em casas de vegetação, envolvendo aspectos de sua arquitetura, distribuição da inteligência, crescimento incremental, flexibilidade e custos. Ele foi aplicado a uma casa de vegetação do Instituto de Biociências da Universidade de São Paulo, dotada de sistema de automação convencional, para a implantação e avaliação de um sistema experimental baseado na rede de controle com a tecnologia LonWorks®. Utilizaram-se nós inteligentes comercialmente disponíveis e um nó desenvolvido em laboratório. A implementação permitiu a verificação experimental das vantagens e desvantagens da utilização da abordagem distribuída em relação à centralizada. Constatou-se a facilidade de implementação, redução no cabeamento, flexibilidade e interoperabilidade da solução. Contudo, os custos tendem a ser mais elevados na abordagem distribuída, no que se refere às ferramentas de apoio e nós inteligentes. Além da avaliação de aplicação da nova tecnologia, propõe-se uma seqüência de passos a se seguir na migração de um sistema convencional para um sistema de controle distribuído, e apresenta-se a disponibilização do sistema desenvolvido como um Web Lab, que possibilita a realização de experimentos remotamente.Protected agriculture using greenhouses allows high quality crops and in any time of the year. The technology has a preponderant role in the control of these environments, although no always successfully. Conventional solutions, such as Programmable Logic Controllers, or systems with proprietary technology are predominant. The evolution of the communication technology is making possible the diffusion of computer networks use in other applications: control networks start to awake the interest of both researchers and users, changing the paradigm of monitoring and control systems conception. The traditional systems with centralized architecture tend to be replaced by distributed technology, and the Internet use makes possible the supervision and control from anywhere. This work discusses the control networks technology applied to greenhouses, involving architecture aspects, intelligence distribution, incremental growth, flexibility and costs. For the implementation and assessment of an experimental system based on LonWorks® technology, a greenhouse at Instituto de Biociências at Universidade de São Paulo was used. Off the shelf intelligent nodes were used and an experimental node was developed. The implementation made possible the experimental verification of advantages and disadvantages of the use of distributed and centralized approach. It was evidenced easiness of implementation, cabling reduction, flexibility and interoperability of the solution. However, the costs tend to be raised in the distributed approach, referring to support tools and intelligent nodes. Besides the new technology application evaluation, a step-by-step sequence is proposed for the migration from a conventional system to a control system, and presents a Web Lab system that enables remote experimentation.
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Wellman, David B. "Econometric models of local area agriculture /". free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025660.
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Dlamini, Barnabas M. "Perceptions of professionals in agricultural education regarding the agriculture teacher education program in Swaziland /". The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487268021749965.
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Henriques, Amilson Barbosa [UNESP]. "Agriculturar a agricultura: a modernização da agricultura no governo estadual paulista (1892-1926)". Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/132146.
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000853618.pdf: 3893430 bytes, checksum: 8c08f80745a010f2e8877ee432c22ff3 (MD5)A presente pesquisa busca compreender e analisar o período de atuação da Secretaria da Agricultura do Governo do Estado de São Paulo entre os anos de 1892 a 1926. O intuito principal é verificar e analisar as propostas e tentativas de modernização da agricultura no Estado. Tal ênfase foi destacada e experimentada durante a segunda metade do século XIX adentrando o século XX, sendo divulgadas em publicações em São Paulo, bem como com respaldo e apoio da Secretaria da Agricultura. O objetivo dessa pesquisa é destacar que a Secretaria da Agricultura paulista desenvolveu, senão uma estratégia de modernização da agricultura, mas sim, que, durante o período a ser pesquisado de sua atuação, esse órgão governamental incentivou e desenvolveu em diversos aspectos a modernização apresentada por parte da elite de agricultores do Estado
This research seeks to understand and analyze the operating period of the Agriculture Department of São Paulo State between 1892's to 1926's. The main purposes are checking and analyzing the proposals and attempts to modernize the agriculture in the state. Such emphasis was highlighted and experienced during the second half of the 19th century entering the 20th century, being disclosed in publications in São Paulo, as well as with the Agriculture Department's uphold and support. The objective of this research is to highlight that the Agriculture Department of São Paulo developed, not an agricultural modernization strategy, but that during the period researched for its performance, this government body has encouraged and developed in several aspects the modernization presented by the elite of farmers in the State
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Henriques, Amilson Barbosa. "Agriculturar a agricultura : a modernização da agricultura no governo estadual paulista (1892-1926) /". Assis, 2015. http://hdl.handle.net/11449/132146.
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Orientador: Paulo Henrique MartinezBanca: Milton Carlos Costa
Banca: Luciene Cristina Risso
Banca: Ulysses Telles Guariba Netto
Banca: Dora Shellard Correa
Resumo: A presente pesquisa busca compreender e analisar o período de atuação da Secretaria da Agricultura do Governo do Estado de São Paulo entre os anos de 1892 a 1926. O intuito principal é verificar e analisar as propostas e tentativas de modernização da agricultura no Estado. Tal ênfase foi destacada e experimentada durante a segunda metade do século XIX adentrando o século XX, sendo divulgadas em publicações em São Paulo, bem como com respaldo e apoio da Secretaria da Agricultura. O objetivo dessa pesquisa é destacar que a Secretaria da Agricultura paulista desenvolveu, senão uma estratégia de modernização da agricultura, mas sim, que, durante o período a ser pesquisado de sua atuação, esse órgão governamental incentivou e desenvolveu em diversos aspectos a modernização apresentada por parte da elite de agricultores do Estado
Abstract: This research seeks to understand and analyze the operating period of the Agriculture Department of São Paulo State between 1892's to 1926's. The main purposes are checking and analyzing the proposals and attempts to modernize the agriculture in the state. Such emphasis was highlighted and experienced during the second half of the 19th century entering the 20th century, being disclosed in publications in São Paulo, as well as with the Agriculture Department's uphold and support. The objective of this research is to highlight that the Agriculture Department of São Paulo developed, not an agricultural modernization strategy, but that during the period researched for its performance, this government body has encouraged and developed in several aspects the modernization presented by the elite of farmers in the State
Doutor
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Luthman, Sarah E. "Impact of agricultural literacy efforts on elementary students' knowledge of production agriculture". Connect to resource, 2007. http://hdl.handle.net/1811/28357.
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Thesis (Honors)--Ohio State University, 2007.Title from first page of PDF file. Document formatted into pages: contains 29 p.; also includes graphics. Includes bibliographical references (p. 19). Available online via Ohio State University's Knowledge Bank.
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Dufour, Jeanne. "Agriculture et agriculteurs dans les campagnes mancelles le devenir des régions agricoles". Lille : A.N.R.T, 1985. http://catalogue.bnf.fr/ark:/12148/cb36105402c.
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Kulkarni, Kedar <1991>. ""Indian Agriculture – Productivity, Climate Change and Institutions An essay in Agricultural Economics"". Master's Degree Thesis, Università Ca' Foscari Venezia, 2016. http://hdl.handle.net/10579/8815.
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"Agricultural sector in India has recorded tremendous growth since Independence. This has been largely possible due to the new agricultural reforms and the arrival of the green and white revolutions. The impact of the new agricultural reforms can be felt in the massive increase in the productivity of coarse cereals and pulses which has enabled India to attain self-sufficiency in food grains. A by-product of this has been the gradual rise of energy inputs. In particular, fertilizer consumption, diesel use and electricity consumption, have seen a dramatic rise post 1960. There also has been a large scale substitution of capital for labour. This is a direct consequence of the increasing population size and food grain demand as India strives to maintain self-sufficiency. However, more importantly, the extravagant use of energy inputs and substitution of capital for labour coupled with new agricultural technology has had an adverse effect on the climate. This thesis makes an attempt to analyse the growth in Indian Agriculture and derive its implications in relation to energy use and CO2 emissions. The specific objective is to estimate the relationship between carbon emissions and agricultural productivity. Although agricultural production in India has witnessed a tremendous growth, it is unclear whether the high intake of energy has an adverse impact on climate. Over the past years, the northern states of India have blossomed partly due to favourable climatic conditions, while the western and southern states have experienced drastic climatic conditions that have adversely impacted agricultural productivity, repercussions of which are felt in farmer suicides and rural to urban migration. This thesis also investigates this issue by throwing light on the role of institutions in the development of agriculture and its implications on climate change.
The findings of the study show the presence of a positive relationship between agricultural productivity and the level of carbon emissions. Further, the study also finds that states with good institution are able to perform better than their competitors endowed with bad institutions."
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Kramar, Laura L. "Assessing the Sustainability of Agricultural Systems". Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/KramarLL2007.pdf.
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Junkins, Harold D. "The influence of participation in secondary agriculture activities on post-secondary pursuits of agriculture students in West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1249.
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Thesis (M.S.)--West Virginia University, 2000.Title from document title page. Document formatted into pages; contains vii, 47 p. Vita. Includes abstract. Includes bibliographical references (p. 36).
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Rammolai, Mogadime Lepokane. "The image of agriculture education in Botswana /". Murdoch University Digital Theses Program, 2009. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20090722.110138.
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Santos, Luciano Ricardio de Santana. "A organização do espaço agrário e as políticas agrícolas no município de Simão Dias (SE)". Universidade Federal de Sergipe, 2008. https://ri.ufs.br/handle/riufs/5603.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorThis study investigate the process for Agricultural Policy on Agricultural Space. Thus extols is the understanding about the changes arising from the introduction, in the Agricultural Space, new actions and new objects that provide a continuity of the expropriator logic of capitalism on the socio-spatial structure. The new actions and new objects in the space created by Public Policy Agrarian increase the duality between Capital and Space. Additionally, the actions and objects new insert a new opposite dynamic on the family farming strutucture, that is based on the replacement of traditional agricultural practices by practicing modern and specialized capitalist farming. The Agricultural Space organization form in Simão Dias city, with the introduction of Agriculture inefficient, shows clearly the modern logic capitalist in which stimulates productivity, unclearly the social-spatial structure through new actions and new foreign objects in the order of space and production of traditional forms of farming community, simãodiense family farmers. The new actions and new objects rival with the objects and actions created by the previous form of family farming, causing the extinction of local agricultural knowledge and enabling the introduction of commercial logic of the capitalist production structure and social-space of simãodiense agrarian farming.
O presente trabalho busca investigar o processo transformador das Políticas Agrícolas sobre o Espaço Agrário. Desta forma, tenta-se entender as transformações decorrentes da introdução, no Espaço Agrário, de novas ações e novos objetos que proporcionam a continuidade da lógica expropriatória do capitalismo sobre a estrutura sócio-espacial. As novas ações e os novos objetos criados no Espaço Agrário pelas Políticas Públicas aumentam a dualidade existente entre Capital e o Trabalho. Ademais, as ações e os objetos novos inserem uma nova dinâmica conflitiva sobre a agricultura familiar, baseada na substituição da prática agrícola tradicional pela prática moderna e especializada capitalista. A forma de Organização do Espaço Agrário no município de Simão Dias, com a introdução de Políticas Agrícolas ineficientes, demonstra, claramente, o alcance da lógica capitalista modernizadora e produtivista que dinamiza, incoerentemente, a estrutura socioeconômica através de novas ações e de novos objetos estranhos ao molde do espaço e das formas tradicionais de produção das comunidades de agricultores familiares simãodienses. As novas ações e os novos objetos rivalizam com os objetos e ações anteriores criados pela forma familiar de produção agrícola. Isto ocasiona a extinção do saber agrícola local possibilitando a introdução do processo de expropriação capitalista do valor.
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Chen, Changping 1958. "Production variability for major Arizona field crops". Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291617.
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Previous variability studies in both U.S. and worldwide agriculture have indicated that crop production has been accompanied by increasing variation. In this research, four different variability indexes were estimated in order to evaluate the production variability associated with the major Arizona field crops. Results show that major Arizona field crops, which are all irrigated, did not have a uniform production variability over the last 24 years and the variability of these crops did not generally increase between the periods of 1967-1978 and 1979-1990. Although biological factors (e.g. pests, weather) influenced variability, the variation of crop production measures over time also was related to market factors (e.g. prices), government farm programs, producers' crop management experience, and the geographical area selected for the analysis. Crops covered by government farm programs usually varied more in harvested acreage and fluctuated less in yield per acre than vegetable crops.
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Guswandi, Guswandi. "Agriculture en Indonésie". Thesis, Paris 1, 2017. http://www.theses.fr/2017PA01E033.
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Cette thèse s’efforce de démontrer que l’évolution de l’agriculture et de la politique du développement agricole en Indonésie est fondée sur de longues expériences historiques s’étendant de l’époque précoloniale jusqu'à aujourd’hui. Les processus de développement ne sont pas de formes linéaires. Ils se sont réalisés par petits à-coups. Suivant les époques, ces différents processus de développement agricoles ont pu suivre des directions opposées.Ceux-ci ont également connu des contradictions fondamentales qui varient en fonction des intérêts de leurs promoteurs. Ces différents développements dépendent en effet de l'État et de ses relations avec d’autres agents comme les grands planteurs (propriétaires des plantations) et les paysans. Ces relations ne sont pas souvent fondées sur un principe d’égalité. L’influence des paysans en matière de négociation est souvent faible face aux autres agents économiques. L’héritage colonial et les structures féodales se font encore sentir de nos jours, et les paysans sont souvent en position de faiblesse, à moins qu’ils s`organisent entre eux pour leurs intérêts communs. Même si les quantités de productions agricoles sont en augmentation, la structure agraire inégale n'a pas beaucoup changé jusqu’à maintenant, depuis les époques féodales (locales), coloniales (européenne) et pendant l`occupation japonaise peu de choses ont changé. Les paysans doivent s’organiser et coopérer ensemble afin d’obtenir l’accès aux terres agricoles et défendre cet accès. Pour les paysans papous, la question principale reste posée : quels seraient des intérêts communs ou convergents entre les paysans indonésiens, ceux du centre (Java), ceux de la périphérie et ceux de Papouasie par exemple pour construire un meilleur avenir pour eux et lutter contre les fortes pénétrations dont ils souffrent aujourd'hui des investissements des capitalistes étrangers, mais aussi de celles des nationaux avec leurs propres élites locales ?This dissertation asserts the complexity of the Indonesian agricultural problems. These problems occurred after the independence in a non-linear historical trajectory. However, the historical inheritance of the successive agricultural and land policies implemented since the precolonial period has also influenced the current situation of the largest actor in agricultural sector, Indonesian peasants. The development processes are not in linear forms, but conjectural ones. They are realized by short burst. According to the periods, they have followed opposite directions. The processes of agricultural development depend on the interests of their promoters : the state and its relations with other agents such as the large planters and the peasants. These relations are often not in equally beneficial. The bargaining position of the peasants is often weaker relative to theother economic agents. Even though the results of agricultural production are increasing, the unequal agrarian structure has not changed much since the feudal (local), colonial (European) and fascist (Japanese) periods. The Indonesian peasants need to self-organize and to cooperate together in order to increase its bargaining position so that they can access the agriculture lands as well as defend them. In the case of the Papuan peasants, the open question is what would be the common or converging interests of Indonesian peasants in general, compared to those in the peripheral regions such as Papua, to prepare a better future for them at the face of strong penetrations they suffer today from foreign and national capitalists, and their own local ruling elites? While ruling out independence option, Javanese and Papuan peasants need to cooperateand, if possible, join force to increase its bargaining position against the strong penetration of capitalists
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Brossier, Jacques. "Gestion et agriculture". Dijon, 1992. http://www.theses.fr/1992DIJOE005.
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La presentation des premieres recherches montre le role fondateur de la theorie de la production et de la programmation lineaire dans les recherches en gestion reposant sur le postulat de coherence et les concepts de finalite, situation et perception, la theorie du comportement adaptatif a ete developpee pour comprendre le fonctionnement du systeme complexe qu'est l'exploitation agricole. L'etude experimentale, clinique, de la gestion passe par le travail en continu avec des groupes d'agriculteurs qui constituent des "laboratoires" socio-economiques, lieux privilegies d'etude des decisions. Dans l'acte de recherche, il y a simultanement un acte de formation du groupe et cet acte est la condition de leur participation. Cette theorie s'est peu a peu elaboree a l'occasion de recherches, elle a permis de produire des methodes : diagnostic global de l'exploitation agricole (digrex) outils de gestion plus centres sur le projet des agriculteurs, planning previsionnel de tresorerie par exemple. Dans le cadre de recherches sur la deprise agricole (pays, paysans, paysages) et sur la pollution par l'agriculture de nappes aquiferes (vittel), ont ete elaborees des methodes d'analyse typologique pour comprendre la diversite des comportements agricoles et des outils pour l'etude des relations (ecologiques, economiques et sociales) qui s'etablissent sur un territoire entre l'activite agricole et son environnement au sens largeThe presentation of the first research shows the seminal role of the production economics theory and of linear programming in the studies of farm management based on the rationality principle and on the concepts of finality, situation and perception, the adaptive behavior theory as been developed to understand the functioning of a complex system : the family farm. The experimental and clinical study of farm management needs to be undertaken with groups of farmers, so -called "socio-economic laboratories". The research on farmer decisions is jointly a training activity for the farmers, and this activity is also the condition of their participation. This theory is based on various studies and has produced several results : farm diagnosis methodology (digrex), management methods focused on the goals of the decision - maker (monetary flow, planning). Within the framework of the research on agricultural retrenchment and on agricultural pollution of underground water quality (vittel), typology analysis tools to understand farm diversity, and tools to study the relationships between space, farm activity and water quality have been created
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El, Khyari Thami. "Agriculture au Maroc /". [S.l.] : Éd. Okad, 1987. http://catalogue.bnf.fr/ark:/12148/cb355387879.
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Riedel, Jodi Songer. "Effects of an Introductory Agricultural Education Course on Agricultural Literacy and Perceptions of Agriculture in Urban Students". NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-07102006-202453/.
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The purpose of this study has been to determine the effects of an introductory agricultural education course on high school urban students agricultural literacy and their perceptions of the food and fiber industry. North Carolina schools offer an introductory course called Agriscience Applications and is meant to be the first in a series of agricultural education courses. This course is expected to positively impact the agricultural literacy and perceptions of agriculture upon its students. Data were collected from six schools in urban counties throughout North Carolina with 152 respondents. Five questions were specified for this study as follows: 1) Does an introductory agricultural education course increase students agricultural literacy in an urban agricultural education program; 2) does an introductory agricultural education course increase student knowledge of agricultural careers and opportunities for employment; 3) does an introductory agricultural education class increase student knowledge of agriculture?s relationship with public policy; 4) does an introductory agricultural education class change a student?s understanding of agriculture?s relationship with the environment and natural resources; 5) what influence does an introductory agricultural education class have upon students? perceptions of the food and fiber industry? Upon completion of the Agriscience Applications course, students did increase their agricultural literacy. The students showed greatest improvement in agriculture literacy regarding public policy and the least improvement in career related knowledge. The perception scores of students regarding agriculture were not statistically significant.
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Walker, Weston D. "Retention and attrition of Missouri agriculture teachers /". free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060155.
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Abdel, Karim Imad. "The impact of the Uruguay round agreement on agriculture on Sudan's agricultural trade /". Aachen : Shaker, 2002. http://www.gbv.de/dms/zbw/356661741.pdf.
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Amaral, Luiz Fernando do. "ICT and agricultural development: the impacts of information and communication-technology on agriculture". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/101/101131/tde-04072017-113450/.
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Within a context of continuous population and economic growth, the future projections for agricultural products\' demand is impressive. At the same time, agriculture already exercises significant pressure on natural resources. As a consequence, the world needs to produce higher agricultural volumes while limiting agriculture\'s impacts on the environment. This thesis evaluates whether empirical indications exist that demonstrate how Information and Communication Technology (ICT) infrastructure development and usage could impact the sustainable development of agriculture. Drawing from the empirical literature on infrastructure\'s impacts on development, two statistical models are created. The first analyses impacts of Internet and mobile usage on cereal yields at a country level using Fixed Effects Panel Regression for 212 countries in five 5-year periods, from 1990 to 2014. The second uses a Propensity Score Matching Model to evaluate how the installation of 3G technology during the period between 2005 and 2009 in Brazilian municipalities located in the Amazon region affected deforestation. Based on the methodology and datasets used, results indicate that the growth of Internet users could have a positive impact on cereal productivity in a country. Results for mobile device users are inconclusive. Finally the second models indicate that municipalities in which 3G technology was installed had lower deforestation rates than similar municipalities lacking 3G technology.Em um contexto de crescimento populacional e econômico, as projeções de demanda para produtos agrícolas no futuro são expressivas. Ao mesmo tempo, a agricultura já exerce pressão significativa nos recursos naturais do planeta. Como consequência, é preciso obter maior oferta de produtos e, ao mesmo tempo, limitar o impacto ambiental da atividade agrícola. Essa tese avalia o papel da infraestrutura e uso de Tecnologia da Informação e Comunicação (TIC) no desenvolvimento sustentável da agricultura. Baseando-se na literatura empírica sobre impacto de infraestrutura no desenvolvimento, dois modelos estatísticos foram criados. O primeiro analisa os impactos do uso de internet e telefones celulares na produtividade de cereais utilizando uma regressão em painel de efeitos fixos para 212 países no período entre 1990 e 2014. O segundo utiliza um modelo Propensity Score Matching para avaliar o impacto da instalação de tecnologia 3G no desmatamento de municipios localizados na região da Amazônia Legal brasileira. De acordo com a metodologia e dados utilizados, os resultados indicam que um crescimento no uso da internet pode positivamente impactar a produtividade de cereais em um país. Para o caso do uso de telefones celulares os resultados são inconclusivos. Finalmente, de acordo com o modelo, há indicações de que municipios que receberam a tecnologia 3G no período estudado tiveram taxas de desmatamento reduzidas quando comparadas a municipios similares que não receberam a tecnologia.
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Oliveira, Ana Ferreira dos Santos. "A sustentabilidade da agricultura orgÃnica familiar dos produtores associados à APOI (AssociaÃÃo dos Produtores orgÃnicos da Ibiapaba-CE)". Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2148.
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No CearÃ, a agricultura familiar à formada em grande parte de pequenos e mÃdios produtores, que tradicionalmente enfrentam problemas de escassez de chuva, falta de crÃdito, tecnologia defasada e baixo nÃvel de renda. Esses problemas, muitas vezes, leva-os a emigrarem para os grandes centros em busca de uma vida melhor, o que intensifica os problemas sociais amplamente conhecidos. Nesse contexto, a agricultura orgÃnica tem se apresentado como uma alternativa de geraÃÃo de emprego e renda, como um meio de garantir a permanÃncia desses produtores no campo. A agricultura orgÃnica à uma atividade que visa promover a preservaÃÃo do meio ambiente, respeitando a biodiversidade e as atividades biolÃgicas do solo. Desta forma, esta atividade enfatiza o uso de prÃticas de manejo em oposiÃÃo ao uso de agrotÃxicos, assim fixando de modo mais definitivo o homem no campo. Acredita-se que esta atividade seja uma forma de produÃÃo ecologicamente sustentÃvel, socialmente justa e economicamente viÃvel em todas as escalas da produÃÃo. AlÃm disso, proporciona a oferta de alimentos mais saudÃveis para responder à demanda crescente por este tipo de produto. No CearÃ, segundo dados do Banco do Nordeste do Brasil (2004), a agricultura orgÃnica tem uma Ãrea plantada de 13.820 ha, espalhados em vÃrios municÃpios, sendo a maior concentraÃÃo na microrregiÃo da Ibiapaba. Os principais produtos cultivados sÃo: hortaliÃas, cafÃ, pastagens,
banana e cultura de subsistÃncia. Esse trabalho tem como objetivo geral analisar a sustentabilidade da agricultura orgÃnica familiar dos produtores associados à APOI
(AssociaÃÃo dos Produtores OrgÃnicos da Ibiapaba)-CE, atravÃs da caracterizaÃÃo sÃciocultural e fazer uma anÃlise dos indicadores, econÃmico, tÃcnico-agronÃmico, manejo,
ecolÃgico e polÃtico-institucional. O resultado permite concluir que o sistema de produÃÃo da APOI Ã sustentÃvel, embora os indicadores econÃmico, tÃcnico-agronÃmico e polÃticoinstitucional, demonstram que precisam ser melhorados para elevaÃÃo do Ãndice de Sustentabilidade.In CearÃ, the family forming is mainly consist of small and medium producers, which traditionally face problems of rain shortage, lack of credit, outdated technology and low income. These problems often lead them to migrate to urban centres in search of a better life, which intensifies well known social problems. In this context, the organic agriculture has shown as an alternative to create job and income generation, as a way to guarantee the permanence of these producers in the countryside. The organic agriculture is an activity which aims for environment preservation, respecting biodiversity and biological activities in the soil. So, this activity emphasizes the use of manual techniques in opposition to the use of agrochemicals, thus definitely fixing man in the countryside. It is believed that this activity is a method of production ecologically sustainable, socially fair and economically viable in all scales of production. Besides, it offers more healthy food, in response to the growing demand for this kind of product. In CearÃ, according to data from Banco do Nordeste do Brasil (2004), the organic agriculture has a cultivated area of 13.820 ha through many communities, being the biggest concentration in the micro region of Ibiapaba. The main cultivated products are: vegetables, coffee, pasture, bananas and subsistence culture. This thesis aims to analyze the familiar organic agriculture sustainability of the producers associated to APOI (AssociaÃÃo dos Produtores OrgÃnicos da Ibiapaba)-CE through the social-cultural characterization, and make an analysis of the economical, technical-agronomical, manual, ecological and politicalinstitutional indicators. The results allow us to conclude that the APOI production system is sustainable, although the economical, technical-agronomical and political-institutional indicators demonstrate they need to be improved to rise the sustainability rate.
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Liu, Yucan. "Risk, induced innovation, and productivity convergence in U.S. agriculture". Online access for everyone, 2007. http://www.dissertations.wsu.edu/Dissertations/Spring2007/y_Liu_043007.pdf.
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Leroux, Alexandra. "Vers une agriculture durable, l'utilisation des produits de compostage : le point de vue des agriculteurs et des agricultrices". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0031/MQ26587.pdf.
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White, Cameron Cash. "SUPERVISED AGRICULTURAL EXPERIENCE IN KENTUCKY: CONDITION AND PERCEPTIONS". Lexington, Ky. : [University of Kentucky Libraries], 2008. http://hdl.handle.net/10225/794.
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Thesis (M.S.)--University of Kentucky, 2008.Title from document title page (viewed on August 21, 2008). Document formatted into pages; contains: ix, 126 p. : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. 122-125).
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Schueller, David Allan. "Farming theological reflections and ecological directions /". Theological Research Exchange Network (TREN), 1991. http://www.tren.com.
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Mbeyo'o, Dieudonné Ndoum. "Dynamics of agro-ecological knowledge among the Mafa, North Cameroon /". Leiden : Leiden university, 2001. http://catalogue.bnf.fr/ark:/12148/cb391678467.
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Thomas, Brian J. "Searching for sustainability : Chinese ecological agriculture in Zhejiang Province /". view abstract or download file of text, 2001. http://wwwlib.umi.com/cr/uoregon/fullcit?p1405201.
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Thesis (M.S.)--University of Oregon, 2001.Typescript. Includes vita and abstract. Includes bibliographical references (leaves 89-94). Also available for download via the World Wide Web; free to UO users. Address: http://wwwlib.umi.com/cr/uoregon/fullcit?p1405201.
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Ergun, Ekrem. "Role of Politically Linked Agricultural Policy and Trade on the Performance of Turkish Agriculture". Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31561.
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The Republic of Turkey has seen a rise in its gross domestic products (GDP), a fall in the share of agriculture percentage of GDP and a contributive role of politically connected development plans that introduce agricultural policies and trade as regional trade agreements (RTAs). It is necessary to gauge the contribution of policy and trade changes to the performance of the Turkish agriculture sector. The primary objective of this thesis is to estimate the performance of the Turkish agriculture sector between 1961 and 2016 using data envelopment analysis (DEA). The secondary objective is to evaluate the impact of politically connected development plans that introduce agricultural policies and trade as regional trade agreements (RTAs) on the performance of Turkish agriculture production. As one of the results, the performance of Turkish agriculture production shows decreases in the following a rise in the number of the regional trade agreements.
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Figueiredo, Gleyce Kelly Dantas Araújo 1984. "Soybean yield estimates based on temporally stables pixels using MODIS/EVI data = Estimativa de produtividade da cultura da soja baseada na estabilidade temporal de pixels utilizando dados MODIS/EVI". [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257114.
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Orientadores: Jansle Vieira Rocha, Rubens Augusto Camargo LamparelliTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola
Made available in DSpace on 2018-08-25T02:24:32Z (GMT). No. of bitstreams: 1 Figueiredo_GleyceKellyDantasAraujo_D.pdf: 15565532 bytes, checksum: e16561814c496d76444d5e593f47a240 (MD5) Previous issue date: 2014
Resumo: A soja é uma das principais commodities do mercado agrícola brasileiro, e está em constante especulação no mercado interno e externo. A estimativa da produtividade com precisão e antecedência utilizando o sensoriamento remoto representa um importante avanço na procura de formas objetivas para previsão de safras no Brasil, uma vez que pode auxiliar a avaliação de rendimento da cultura, servir de apoio à segurança alimentar, ao planejamento econômico e a gestão dos recursos naturais. No entanto, ainda não há no país um sistema operacional para estimar produtividade. O principal objetivo desse estudo foi propor uma metodologia para estimar, por município, a produtividade da soja, baseado em dados espectrais (EVI/MODIS) e dados históricos de rendimento durante os anos safra 2000/2001 a 2010/2011 no estado do Paraná. Esses dados foram utilizados para estabelecer a correlação entre EVI e produtividade da soja por pixel utilizando duas abordagens: por mês (outubro a abril) e por estágios fenológicos (emergência a maturação, emergência a floração, floração a maturação, floração ao enchimento dos grãos), criando-se então dois tipos de mapas de correlação. Com isso foi possível detectar pixels que tinham as melhores correlações ao longo do tempo e ainda encontrar o período mais adequado para estimar a produtividade. Os resultados mostraram que a maior correlação foi encontrada no período de pico vegetativo da cultura para ambas as abordagens. Em seguida comparou-se o desempenho dos mapas de correlação com máscaras de culturas especificas para estimar a produtividade. Os mapas de correlação apresentaram resultados mais significativos, com RMSE de 0.173 ton/ha, enquanto a máscara de cultura específica apresentou RMSE de 0.294 ton/ha. Em seguida selecionamos os pixels temporalmente estáveis dentro dos mapas de correlação por meio da técnica de estabilidade temporal, a fim de incluir somente pixels que apresentassem o mesmo padrão temporal de desenvolvimento durante a safra. A técnica apresentou-se eficiente, selecionando desde pixels puros a pixels com alguma porcentagem da cultura dentro dele, assim, estes pixels foram utilizados para estimar a produtividade da soja durante os onze anos de estudo, também utilizando as abordagens por mês e por fase fenológica. Para a primeira abordagem o período de pico vegetativo apresentou melhor resultado, sendo o mês de fevereiro o que apresentou valores mais próximos aos dados oficiais com RMSE de 0.187 ton/ha, na segunda abordagem o melhor desempenho foi para o período de floração a maturação com RMSE de 0.193 ton/ha e o índice de concordância de Willmott foi de 96% para fevereiro e 95.8% durante a floração e maturação. Esta metodologia mostrou ser eficiente para estimar a produtividade por mês, assim é possível utilizá-la como ferramenta auxiliar na previsão de produtividade
Abstract: Soybean is one of the main commodities of the Brazilian agricultural market, and is subject to constant speculation in internal and external markets. Timely and accurate yield estimation using remote sensing represents an important advance in the search for objective crop forecasting in Brazil, since it may help government to plan storage and/or acquisition of food, serving as support to food security, decision making and management of natural resources. However, an operating crop yield estimating system is not currently available in the country. The main goal of this study was to propose a methodology to estimate soybean yield at county level, based on spectral data (EVI/MODIS) and historical yield data during 2000/2001 to 2010/2011 cropping season, in Parana state. These data were used to establish the correlation between EVI and soybean yield at pixel level using two approaches: by month (October to April) and by phenological stages (emergence to maturity, emergence to flowering, flowering to maturity, flowering to grain filling), generating two types of correlation maps. It was possible to detect pixels that had the best correlation over the crop cycle and still find the most suitable period to estimate yield. The results showed that the highest correlation was found in the vegetative peak period of the crop for both approaches. Then I compared the performance of correlation maps against crop specific mask to estimate soybean yield. The correlation maps showed meaningful results with RMSE of 0.173 ton/ha while the crop specific mask showed RMSE of 0.294 ton/ha. Then I selected the temporally stable pixels within the correlation maps using the temporal stability technique in order to include only pixels that presented the same temporal development pattern during the crop cycle. The technique was efficient, once selected pure pixels or pixels with some percentage of the crop, so these pixels were used to estimate soybean yield during the eleven years of study; also using the approaches by month and by phenological stages. For the first approach the vegetative peak showed better results and February showed values closest to official data with RMSE of 0.187 ton/ ha, the best performance of the second approach was the period from flowering to maturity, with RMSE of 0.193 ton/ ha and Willmott agreement index of 96% for February and 95.8% for the flowering to maturity period. This methodology showed to be efficient to estimate yield monthly, thereby it is possible to use it as an auxiliary tool in yield forecast
Doutorado
Planejamento e Desenvolvimento Rural Sustentável
Doutora em Engenharia Agrícola
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Barbosa, Luciano Celso Brandão Guerreiro. "A comercialização de produtos orgânicos como alternativa para a geração de sustentabilidade aos agricultores familiares". Universidade Federal de Alagoas, 2007. http://repositorio.ufal.br/handle/riufal/1107.
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The organic agriculture is a production paradigm that is being currently discussed by the
academy and economic agents (companies, governments and consumers) This production
model is evolving its theoretical approach. However, several barriers obstruct the
consolidation and expansion of this segment. The commercialization is one of them,
especially for a productive system that seeks to be sustainable, how can a productive system
be considered sustainable if it does not generate social, economical and environmental
benefits for its players. In this context, this dissertation seeks to evaluate if the direct
commercialization of organic products can be an alternative to generate sustainable income
for the family farmers. To do so, this essay analyzed the behavior of the Alagoas organic
segment, having as a reference the Feira Agroecológica de Maceió as well as the family
farmers with properties until 5 hectares with commercial articulation to the Feira. Thus, the
research concluded that the organic agriculture is a feasible alternative to family farmers,
because it allows to reach economic, social and environmental sustainability. The
commercialization, however, is the main limiting factor for the consolidation and expansion
of this segment in Alagoas. Therefore, it depends on the rules to foment this productive
segment through specific policies for the organic agriculture and the institutional parameters.
Settle down the man in rural areasCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
A agricultura orgânica é um paradigma de produção que está sendo muito discutido pela academia e pelos agentes econômicos (empresas, governos e consumidores). Esse modelo de produção ainda está aprimorando seus pilares teóricos e produtivos. Existem diversos gargalos que dificultam a consolidação e expansão desse segmento. A comercialização é um desses gargalos, principalmente para um sistema produtivo que procura ser sustentável, pois como um sistema produtivo poderá ser considerado sustentável se não gerar benefícios sociais, econômicos e ambientais para os seus participantes. Diante desse contexto, esta dissertação buscar avaliar se a comercialização direta de produtos orgânicos pode ser uma alternativa para a geração de sustentabilidade aos agricultores familiares. Para que essa pergunta fosse respondida foi necessária à análise do comportamento do segmento orgânico alagoano, tendo como base de referência a Feira Agroecológica de Maceió e os agricultores familiares, com estabelecimentos menores que 5 hectares, articulados a esse ponto de venda varejista particular. Assim, essa pesquisa chegou à conclusão de que a agricultura orgânica é uma alternativa viável aos agricultores familiares, pois permite se alcançar a desejada sustentabilidade econômica, social e ambiental. A comercialização, todavia, é o principal fator limitante a consolidação e expansão desse segmento, em Alagoas. Sendo assim, cabe aos governantes fomentar esse segmento produtivo por meio de políticas específicas para a organocultura e por meio do fortalecimento do ambiente institucional. A fixação do homem no campo faz parte dessa necessidade e de todo um país, em busca de um modelo de desenvolvimento sustentável.
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Thesis (M.S.)--University of Kentucky, 2008.Title from document title page (viewed on August 25, 2008). Document formatted into pages; contains: x, 146 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 139-144).
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Beaudreault, Amy. "Students' taste for organic food: a look into influences of perceptions". The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1399555659.
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Giorgi, Aaron John. "A National and University Multi-decade Description of College of Agriculture and Related Sciences Student Behaviors Regarding Postsecondary Education". The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586637590318518.
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Howard, Ronald L. "Perceptions of students and teachers regarding agriculture in Leflore County, Mississippi". Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=945.
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Thesis (M.S.)--West Virginia University, 1999.Title from document title page. Document formatted into pages; contains ix, 78 p. : ill. (some col.) Vita. Includes abstract. Includes bibliographical references (p. 44-47).
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Purseigle, François. "Les sillons de l'engagement : jeunes agriculteurs et action collective /". Paris ; Budapest ; Torino : l'Harmattan, 2004. http://catalogue.bnf.fr/ark:/12148/cb39245748x.
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Texte remanié de: Th. doct.--Sociol. rurale--Toulouse--Ec. natl. sup. agronomique, 2003. Titre de soutenance : L'engagement des jeunes agriculteurs dans les organisations professionnelles agricoles : contribution à l'étude des processus d'entrée dans l'action collective.Bibliogr. p. 245-256.
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