Nutrient Exportation
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Estuary Adjacent to a Megalopolis as Potential Disrupter of Carbon and Nutrient Budgets in the Coastal Ocean
The goals were to estimate nutrients and carbon flow rates between Guanabara Bay and the adjacent coastal waters, to characterize the provenance of the exported/imported organic matter. Samples were collected from different depths over 25 h in two seasons at the bay entrance. Measurements included physicochemical parameters, nutrients, chlorophylls, dissolve
J. Braz. Chem. Soc.. Publicado em: 2016-10
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2. Estoque de nutrientes nos resíduos da exploração de bracatingais.
Nos talhoes do sistema agroflorestal tradicional da bracatinga (Mimosa scabrella Benth.), a exportacao de nutrientes ocasionada pela queima periodica dos residuos de exploracao vem empobrecendo os solos. Este estudo foi realizado, complementarmente, a um inventario de biomassa dos residuos de exploracao, em cinco bracatingais. foram colhidas anostras das fra
Boletim de Pesquisa Florestal. Publicado em: 2011
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3. Acumulo de materia seca e de nutrientes em milho cultivado no periodo inverno-primavera.
O trabalho procurou avaliar o acumulo de materia seca e de N, P, K, Ca, Mg e Zn e a eficiencia de conversao em graos de tres cultivares de milho (BR 201, BR 106 e AG 519) no periodo inverno-primavera, em solo LVA de Prudente de Morais, MG. Os tratamentos foram dispostos em blocos ao acaso com tres repeticoes. As plantas de milho foram coletadas em 5 estadios
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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4. Variable rate application of potassium fertilizer for soybean crop growth in a no-till system.
Variable rate application of fertilizer has the potential to improve nutrient use efficiency, improve economic returns, and reduce negative environmental impacts. The objective of this study was to evaluate the variable rate application of potassium fertilizer to soybean crop in a no-till system. The study was conducted on a 13-ha soybean grain field in Cara
INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE. Publicado em: 2011
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5. Atributos químicos de argilossolo e exportação de nutrientes por culturas sob sistemas de preparo e de adubação / Chemical attributes of an ultisol and nutrient exportation by crops under soil tillage and fertilization systems
Métodos de preparo e de adubação podem afetar os atributos químicos do solo e, consequentemente, sua fertilidade. Com o objetivo de avaliar as alterações em atributos químicos do solo, ao longo do período de dez anos, foram avaliados os resultados da análise de amostras de solo coletadas em nove épocas, em três profundidades (0-5; 5-10; 10-20 cm);
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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6. Dinâmica de nutrientes na cana-de-açúcar em sistema irrigado de produção
One of the main investments in the alcohol and sugar sector is the technological innovations searching for increments in the productivity of the sugar cane fields, as an example, the genetic improvement of the sugar cane producing new varieties more productive and environmentally adapted. The productive capacity of these varieties, however, may have being un
Publicado em: 2008
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7. Fertilization of pre-planting on growth, production and quality of blackberry (Rubus sp.). / Adubação de pré-plantio no crescimento, produção e qualidade da amoreira-preta (Rubus sp.)
Blackberry is a temperate climate fruit that due to its rusticity, good yield, fast economic feedback and several options of market, it is a good alternative for small farms diversification. The objective of this work was to assess the effect of seven different pre-planting fertilizers on blackberries cultivars Tupy and Xavante. The experiment was carried ou
Publicado em: 2008
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8. O uso de praias arenosas e áreas de mangue por peixes jovens em duas baías do Sudeste do Rio de Janeiro. / Use of sand beaches and mangrove area for juveniles fishes in two bays of southeastern of Rio de Janeiro.
Mangrove areas and bays are ecosystems that play an important ecological role by suppling vias to energy importation and exportation (migrations, predation, fisheries, etc.). The present work aims to identify variations in juveniles fish assemblages in beaches and mangrove areas to test the hypothesis that structural differences which characterize these two
Publicado em: 2006
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9. Growth and nutrients absorption march in bean cvs. BRS-MG Talismà and Ouro Negro cultivated in no-tillage and conventional crop system. / Crescimento e marcha de absorÃÃo de nutrientes no feijoeiro cvs. BRS-MG talismà e ouro negro, em plantio direto e convencional
Com o objetivo de estudar a curva de crescimento em altura e acÃmulo de matÃria seca, alÃm do teor, acÃmulo, marcha de absorÃÃo e exportaÃÃo de nutrientes ao longo do ciclo cultural do feijoeiro, foram conduzidos quatro experimentos de campo, com as cvs. Ouro Negro e TalismÃ, em plantio direto e convencional. Um experimento foi conduzido em Lavras (
Publicado em: 2006
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10. Parâmetros de crescimento e marcha de absorção de nutrientes na produção de minitubérculos de batata cv. Atlantic. / Growth parameters and uptake rate in potato cv. Atlantic minituber production.
As potato is the most important economic annual staple crop in Brazil and its production involves high costs, new alternatives are being adopted to decrease costs and obtain high quality potato seed. This study aimed at determining the growth parameters and the uptake rate by seedling from cv. Atlantic to be used for minituber production in a hydroponic syst
Publicado em: 2005
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11. DRIS para avaliação do estado nutricional da soja em duas regiões do cerrado brasileiro / DRIS to evaluate the nutritional status of soybean in two savanna areas in Brazil
Nowadays, soybean is the main oleaginous plant in Brazil, cultivated in all latitudes of the country it is the most important agricultural product of exportation. The high cost of fertilization and the importance of the mineral nutrition over productivity, make indispensable the use of evaluation techniques for the nutritional status as well as the foliar di
Publicado em: 2005
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12. Distribuição e crescimento radicular em soqueiras de cana-de-açúcar: dois cultivares em solos com características distintas / Root growth and distribution in sugarcane ratoon: two genotypes in soils with distinctive characteristics
To test the hypothesis that, in soils with low clay content, sugarcane genotype RB83 5486 has better root system development than genotype RB83 5089, two field experiments were conducted in Porto Feliz, SP. Soils were classified as Typic Kandiudalf and Typic Hapludox. Twelve sugarcane genotypes were cropped in the experimental sites, with a experimental desi
Publicado em: 2005