Crop Evolution
Mostrando 13-24 de 55 artigos, teses e dissertações.
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13. Análise da via de regulação gênica do miRNA156/SPL na brotação lateral e caracterização molecular do processo de emergência da gema axilar de cana de açucar / Analysis of the role(s) of the miRNA156/SPL pathway on branching/tillering and molecular characterization of sugarcane lateral bud outgrowth
Sugarcane is an economically important biofuel crop that recently has become a target for improvement of sustainable biomaterial production due to its high biomass productivity and built-in containment features. Therefore, studies aiming to improve the production of biomass per area are among the most important issues in sugarcane production. Plant biomass i
Publicado em: 2011
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14. AGRICULTURE OF PRECISION: MANAGEMENT OF THE FERTILITY WITH APPLICATION OF THE VARIED RATE OF FERTILIZERS AND ITS RELATION WITH CROP YIELDS / AGRICULTURA DE PRECISÃO: MANEJO DA FERTILIDADE COM APLICAÇÃO A TAXA VARIADA DE FERTILIZANTES E SUA RELAÇÃO COM A PRODUTIVIDADE DE CULTURAS
The agriculture of precision has been an important tool for the characterization of the spatial variability of soil attributes and crops. Thus, there is many options to elaborate thematic digital maps that can improve the soil and crop management. In this work, two croplands that has been managed with precision agriculture during several years were selected.
Publicado em: 2009
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15. EvoluÃÃo das caracterÃsticas morfoanatÃmicas nos ciclos de seleÃÃo do milho âSaracuraâ sob encharcamento intermitente / Evolution of morpho-anatomicals characteristics on selection cycles of maize (Zea mays L.) âSaracuraâ â BRS â 4154 under intermittent soil flooding
Although every single plant needs a certain amount of water, the excess around roots can cause severe injuries and even death of most crops. Soil flooding is one of the most important factors which affects maize crop production and development on tropical and subtropical regions. Excess of water blocks the oxygen transfer and others gases from soil to atmosp
Publicado em: 2009
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16. Water and energy fluxes in cowpea and castor beans cultivated in northeast Brazil / Fluxos de Ãgua e de energia em feijÃo macassar e mamona no nordeste do Brasil
The castor beans and cowpea are crops of enormous economic and social importance for the farmers in northeast Brazil, whereas the extracted oil of seeds of castor beans is used for production of biodiesel and the cowpea is the main food for poor population. Independent of crop type, the knowledge of water amount removed from soil by vegetation is of great in
Publicado em: 2009
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17. Biological and molecular characterization of begomoviruses in soybean (Glycine max) and Euphorbia heterophylla, and RNA interference-mediated virus resistance in transgenic soybean plants / Caracterização molecular e biológica de begomovírus de soja (Glycine max) e leiteiro (Euphorbia heterophylla) e resistência a vírus mediada por RNA interferente em plantas transgênicas de soja
Molecular characterization of begomoviruses is of fundamental importance to identify the mechanisms of genetic variability of these important plant pathogens. Genome analysis allows for an understanding of mutation and recombination mechanisms which lead to evolution of new viral species. In Brazil, only a few reports of begomovirus infection of soybean have
Publicado em: 2009
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18. Avaliação técnica e comercial da empresa Sementes Iruña - Paraguai / Technical and commercial evaluation of Iruña Seeds company - Paraguay
The seeds company Iruña is located at km 162, Cruce Raul Peña, in Alta Parana state Paraguay. It has begun its seeds production activities in 1983 with the commercialization of 3.129 forty kilos bags of soy seeds. Lately, the foreseen commercialization of seeds is approximately to 4.400 t of soy seeds and 2.500 t of wheat seeds. Internally, the intended se
Publicado em: 2008
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19. Evolução da matéria orgânica, do fósforo e da agregação do solo em sistema de integração agricultura-pecuária em plantio direto, submetido a intensidades de pastejo / Evolution in organic matter and phosphorus content and in soil aggregation on an integrated crop-livestock system under no-tillage and different grazing intensities
Em sistemas de plantio direto com plantas de cobertura e produção de grãos, a dinâmica da matéria orgânica, do fósforo e da biomassa microbiana é diferenciada, quando comparada com a que ocorre com a inserção do animal nesse sistema, que pode promover uma melhoria nas propriedades funcionais do solo. No entanto, são poucos os trabalhos que tem o f
Publicado em: 2008
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20. Diversidade genÃtica e avaliaÃÃo de genÃtipos de feijÃo-caupi contrastantes para resistÃncia aos estresses biÃticos e abiÃticos com marcadores SSR, DAF e ISSR
O estudo da diversidade genÃtica entre acessos de bancos de germoplasma fornece importantes subsÃdios aos programas de melhoramento vegetal. Com a finalidade de caracterizar a diversidade genÃtica inter e intra-especÃfica do gÃnero Vigna, as tÃcnicas de DAF (DNA Amplification Fingerprinting), ISSR (Inter Simple Sequence Repeat) e SSR (Simple Sequence R
Publicado em: 2008
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21. Remote sensing and GIS for cotton crop analysis in Campo Verde and Primavera do Leste - Mato Grosso state, Brazil / Sensoriamento remoto e SIG na análise da cotonicultura nos municípios de Campo Verde e Primavera do Leste - MT
Cotton represents 50% of textil fiber used around the world. In the second half of the 90s a new system production allowed the cotton transfer to Cerrado region. In this regard, it is necessary to count on reliable information that allows to analyze the cotton crop in this region. In this context, the hypothesis of this work was that remote sensing data and
Publicado em: 2007
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22. Ensino agrícola, trabalho e modernização no campo : a origem da Escola Superior de Agricultura e Veterinária do Estado de Minas Gerais (1920-1929)
This search is located in the Education Institutions History field and it aims to interpret the Agricultural and Veterinary Superior School of Minas Gerais (ESAV) construction project known by Viçosa School in the period between 1920 and 1929. The beginning of this educational institution and the agriculture conservator modernization are subjects of this se
Publicado em: 2007
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23. Estrutura genética de populações de Amphobotrys ricini, agente causal do mofo cinzento da mamoneira
The gray mold, causal organism Amphobotrys ricini, is one of the major diseases of castor bean. Difficulties in managing plant disease arises form the limited understanding of the genetic structure of A. ricini, their complexity and variability make it difficult to control. Genetic structure can be used to infer the relative impact of different forces that i
Publicado em: 2007
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24. THE UNSUSTAINABILITY OF SOIL USE WITH TABACCO CROP ON STEEP SLOPES / A INSUSTENTABILIDADE DO USO DO SOLO COM FUMICULTURA EM TERRAS DECLIVOSAS
Areas susceptibility to water erosion and strong pressure of soil use, as in Southern Brazil, where there is cultivation of tobacco, are prone to degradation of the natural resources. The objective of this dissertation was to evaluate the unsustainability of the natural resources in a watershed under tobacco production, characterized by steep slopes, with in
Publicado em: 2007