Tobacco Cultivation
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Agriculture itinérante sur brûlis (AIB) et plantes cultivées sur le haut Maroni: étude comparée chez les Aluku et les Wayana en Guyane française
Abstract In the late 18th century, Aluku Maroons, descendants of rebel slaves from Dutch plantations and Wayana Indians, fleeing from Brazilian slave hunters met on the upper Maroni in French Guiana. They shared the river and several techniques of subsistence, including slash and burn agriculture, and cultived plants. However our study shows that ancestor wo
Bol. Mus. Para. Emílio Goeldi. Ciênc. hum.. Publicado em: 2016-08
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2. Tensile strength and friability of an Alfisol under agricultural management systems
Management systems may influence the structural quality of soils. Tensile strength (TS) and friability (F) are indicators of soil structural quality. The aim of this study was to evaluate the TS and F of an Alfisol under different management systems. The treatments were as follows: (i) soil under conventional system with growing maize after tobacco cultivati
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-04
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3. Occurrence of agrochemicals in surface waters of shallow soils and steep slopes cropped to tobacco
Tobacco cultivation in shallow soils and steep landscape under intense use of agrochemicals contributes to environment degradation. In this study, we assessed the concentration of agrochemicals in draw wells used for human consumption and a creek in a small catchment predominantly cropped to tobacco. Chlorpyrifos, flumetralin, and iprodione were determined b
Quím. Nova. Publicado em: 2013
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4. Município de Canguçu, RS : o relevo e sua morfodinâmica como condicionantes do dinamismo agrícola
The study of relief and its relation with the soils occurring in the municipality of Canguçu, Rio Grande do Sul, aims at doing a detailed and comparative analysis of those natural components that condition the rising or reduction of the potentialities or limitations to the use of soil for the development of systems of cultivation and livestock rearing. In o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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5. MODELING OF WATER, SEDIMENT AND PHOSPHORUS LOADS IN AN AGRICULTURAL WATERSHED IN SOUTHERN BRAZIL / MODELAGEM DO ESCOAMENTO, DA PRODUÇÃO DE SEDIMENTOS E DA TRANSFERÊNCIA DE FÓSFORO EM BACIA RURAL NO SUL DO BRASIL
Areas under intensive tobacco crop cultivation have been impacting the water balance and increasing soil erosion in Southern Brazil. Application of large amounts of mineral fertilizers, higher than the tobacco requirement, contributes to excessive phosphorus loads in soil and water bodies. The assessment of potential environmental impacts due to changes in l
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2011
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6. Evaluation of the lisem model for the simulation of hydrosedimentologic processes in a small rural catchment on the basalt slopes of Rio Grande do Sul, Brazil / Avaliação do modelo LISEM na simulação dos processos hidrossedimentológicos de uma pequena bacia rural localizada nas encostas basálticas do Rio Grande do Sul
The intensive cultivation of the areas of southern Brazil that have poor agricultural potential (shallow soils on steep, basaltic hillsides) has contributed to the degradation of the environment by increasing rates of soil erosion and sediment yields. In this study, traditional monitoring methods have been combined with concurrent mathematical modeling to ve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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7. Family Agriculture and Food Security: the importance of production for self-consumption / Agricultura Familiar e Segurança Alimentar: a importância da produção para o autoconsumo
The present dissertation approaches the theme of food security in the family agricultural context, having as its basis a research performed in the municipalities of Pelotas, São Lourenço do Sul and Canguçu. The focus of the study is centered upon the issue of self-consumption, which involves a myriad of practices adopted by families to ensure the full or
Publicado em: 2008
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8. The agroenvironmental transition in the context of tobacco cultivation: ways and obstacles on the family farmers view of the central sub region of Rio Pardos Valley, RS. / A transição agroambiental no contexto da fumicultura: caminhos e obstáculos na ótica dos agricultores familiares da sub-região centro do Vale do Rio Pardo, RS
A caminhada recente da transição agroambiental na região tradicionalmente produtora de fumo do RS, a sub-região centro do Vale do Rio Pardo, constitui-se, hoje em dia, em uma alternativa técnica e socioeconômica, aparentemente, ainda nos seus primórdios. As dificuldades em desenvolver o projeto da transição embasado nas referências agroecológicas
Publicado em: 2007
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9. 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
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10. Subcellular localization of spinach cysteine synthase isoforms and regulation of their gene expression by nitrogen and sulfur.
Subcellular localization and regulation of the spinach (Spinacia oleracea) cysteine synthase (O-acetyl-L-serine[thiol]-lyase, EC 4.2.99.8) isoforms (CysA, CysB, and CysC) were determined in transgenic tobacco (Nicotiana tabacum) and in spinach cell cultures. The 5' regions of CysB and CysC encoding the chloroplastic (CysB-TP) and the putative mitochondrial (
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11. Chloroplast transformation by Agrobacterium tumefaciens
A chimeric gene consisting of the promoter region of the nopaline synthase gene (Pnos) fused to the coding sequence of the chloramphenicol acetyltransferase gene (cat gene) of Tn9 was introduced by co-cultivation in tobacco protoplasts followed by selection with 10 μg/ml chloramphenicol. The chloramphenicol-resistant plants derived from these selected calli
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12. Engineering herbicide resistance in plants by expression of a detoxifying enzyme
Phosphinothricin (PPT) is a potent inhibitor of glutamine synthetase in plants and is used as a non-selective herbicide. The bar gene which confers resistance in Streptomyces hygroscopicus to bialaphos, a tripeptide containing PPT, encodes a phosphinothricin acetyltransferase (PAT) (see accompanying paper). The bar gene was placed under control of the 35S pr