998 resultados para 1995_03262330 TM-44 4501703
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Pós-graduação em Enfermagem (mestrado profissional) - FMB
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Regional Overview Opinion. The Growth Cycle in the Region and Challenges to Competitiveness The External Sector Oil Bills of Some Central American Countries Have Doubled since 2002 New Trend in Latin America is to Issue Sovereign External Debt in Local Currencies Macroeconomic Policy Internal Performance Economic Growth Fuels Better Job Creation in Latin America and the Caribbean Statistical Appendix Recent Titles Calendar of Events
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Número especial sobre el "Balance preliminar de laseconomías de América Latina y el Caribe 2005" Panorama regional Columna de opinión: El ciclo expansivo regional y los desafíos para la competitividad. Por José Luis Machinea, Secretario Ejecutivo de la CEPAL El sector externo Factura petrolera se duplicó entre 2002 y 2005 en algunos países centroamericanos Nueva tendencia latinoamericana a emitir deuda soberana externa en moneda local Política macroeconómica El desempeño interno Mejora generación de empleo en América Latina y el Caribe con crecimiento económico Apéndice estadístico Publicaciones recientes Calendario
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Nitrogen (N) is the most required nutrient for corn plants and, in order to supply this demand in highly productive crops, mineral fertilizers are used, especially urea. The disadvantage of urea is the loss of N-NH3 to atmosphere. To reverse this situation, some technologies have been developed, such as nitrification and urease inhibitors, which are used as additives to urea. This work aimed at evaluating the agronomic efficiency of urea stabilized with urease and nitrification inhibitors applied to cover the 2013/2014 corn crop. We evaluated 11 nitrogen fertilizer applied in coverage: urea + PA (41.6% N, 3% Cu); urea + PA (41.6% N, 1.5% Cu); urea + PA (41.6% N, 3% Zn); urea + PA (41.6% N, 1.5% Zn); urea + PA (41.6% N, 0.34% Cu, 0.94% B); urea + PA (41.6% N, 0.25% Cu, 0.68% B); urea + PA (41.6% N); urea (44.3% N, 0.15% Cu, 0.4% B); urea (43% N, 0.1% Cu, 0.3% B, 0.05% Mo); pearled urea (46% N); urea + 0,8% DMPP (45% N) and the control, which did not receive nitrogen topdressing. The evaluations were: Nitrogen losses through volatilization, content and accumulation of N, boron (B), copper (Cu) and zinc (Zn) to the dry matter of aerial parts, grains, and in straw and grain productivity. Fertilizers stabilized with urease and nitrification inhibitors did not reduce the volatilization of ammonia volatilization, when compared to pearled urea. Urea with 0.8% of DMPP nitrification inhibitor (3,4-dimethylpyrazole phosphate) provided higher loss by volatilization, lower productivity and agronomic efficiency compared to pearled urea. The coating of urea with Cu, B and Zn did not increase the accumulation of these nutrients in grains and MSPA plants. The use of fertilizers stabilized and coated with micronutrients did not increase the productivity and agronomic efficiency compared to conventional urea.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Editorial .-- Discusión abierta: Nexo Agua, Energía y Alimentación. Conflictos por el agua en la región. Eficiencia energética y regulación. Políticas e institucionalidad en agua potable. Impactos y vulnerabilidad al cambio climático de los ríos de Mendoza y San Juan .-- Reuniones: − Políticas de Agua en el Contexto de la Agenda de Desarrollo Post-2015. Consulta Regional sobre Seguridad Hídrica. Latinosan 2016. -- Noticias de la Red: Bolivia: Ley de la Década del Riego. Chile: Política Nacional de Recursos Hídricos. Costa Rica: Comité Nacional de Hidrología y Meteorología. Honduras: Comisión Presidencial de Coordinación del Sector Agua. Perú: Decreto que Regula el Régimen de Monitoreo y Gestión de Aguas Subterráneas. -- Cursos: Tópicos Técnicos en Materia de Evacuación y Disposición de Aguas Servidas Rurales.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)