Last Irrigation
Mostrando 25-36 de 43 artigos, teses e dissertações.
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25. Impacts on the soil chemical characteristics and development of amaranth under saline stress and mulch / Impactos do estresse salino e da cobertura morta nas características químicas do solo e no desenvolvimento do amaranto
Availability of good quality water has been reduced vertiginously, over the last decade, in the world. In some regions, the water resources have high concentration of the dissolved salts, these characteristics of the water make its use impossible. Water quality can be a limitation for irrigated agriculture, principally in regions of arid or semiarid climate
Publicado em: 2007
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26. Variabilidade espacial de atributos fisico-hidricos do solo cultivado com feijão irrigado sumetido a diferentes sistemas de preparo / Soil physical-hydric attributes spatial variability doe diferent irrigated bean tillage systems
Since last decades irrigation practices are recognized as major water consumers, requiring specific agricultural producers education and awareness on water use and supply. Recent research reports indicate significant water economy, crop yielding as well as contribution to sustainable agricultural development, if direct seedling, when compared with convention
Publicado em: 2007
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27. Tebuthiuron herbicide behavior in sugar cane soil using modified drainage lysimeter / Comportamento do herbicida tebuthiuron em solo de cultivo de cana-de-açucar utilizando lisimetro de drenagem modificado
Tebuthiuron is one of the most used herbicides in sugar cane, in São Paulo State. Studies have been carried through to determine the tebuthiuron leaching index and to monitor its presence in superficial and groundwater sources, without still a definitive conclusion. With the objective to evaluate, in field conditions, the vertical movement of the herbicide
Publicado em: 2007
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28. Numerical simulation of the water movement and solutes in soil unsaturated / Simulação numérica do movimento de água e solutos em solos não saturados
The interest in studying problems of underground drainage and solutos transport not in soils saturated it has been increasing significantly in the last years, mainly because of the growing concern with the quality of the soil and of the environment in general. Applied fertilizers in agricultural lands move below the zone radicular of the plants and they can
Publicado em: 2007
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29. Estudo e diagnostico da agricultura irrigada na região do alto da bacia hidrografica do rio Itapicuru - Bahia / Assessment and diagnostic of the irrigated agriculture in the upper part of the Itapicuru river basin - state of Bahia
Irrigation is a key factor for increasing crop yield in arid and semiarid regions, but the inadequate use of irrigation can lead to serious concerns related to economical and environmental aspects. The Itapicuru river basin, in the northeast of the State of Bahia, with more than 90% of the area in the so-called Drought Polygon Region, has received heavy inve
Publicado em: 2006
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30. Influência do aumento do diâmetro cirúrgico sobre a limpeza do terço apical de canais radiculares curvos submetidos ao preparo biomecânico com instrumentos de Níquel-Titânio / Influence of surgical diameter augmentation on cleaning of the apical third of curved root canals submitted to biomechanical preparation with nickel-titanium instruments
This study evaluated the influence of the surgical diameter on the cleaning capacity of Hero 642 system in root canals, using morphometric analysis. Roots of forty maxillary molars with curvature angle between 20 and 40, curvature ratius ≤ 10 mm and diameter corresponding to the 25 instrumnets were randomly divided into 4 groups according to the surgic
Publicado em: 2006
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31. Energetic balance in organic farming of vegetables / Balanço energético em cultivos orgânicos de hortaliças
The concerning with preservation of the natural sources and to the human health have been outstanding in the last decades. Therefore the organic agriculture has been developed in several countries, including Brazil, searching to attend these longings of the society. This mission can be reached with efficiently only if this agriculture is implemented in agric
Publicado em: 2006
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32. Evaluation of models for estimating electrical conductivity and potassium concentration of the soil solution by using time domain reflectometry (TDR) / Avaliação de modelos para estimar a condutividade elétrica e a concentração de potássio na solução do solo usando Reflectometria no Domínio do Tempo (TDR)
Time domain reflectometry is a technique that has been outstanding in the last years as an attractive tool for soil water content (θ) and for bulk electrical conductivity (ECa) monitoring on real time, automatically, with the minimum soil disturbance. Besides, this technique allows the knowledge of electrical conductivity (ECw) and nutrient concentratio
Publicado em: 2006
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33. InfluÃncia do Ãltimo instrumento apical do sistema proTaper associado ou nÃo ao hipoclorito de sÃdio no preparo de canais radiculares com achatamento: anÃlise histolÃgica / Influence of the last apical instrument of the ProTaper system associated or not with the sodium hypochlorite in the root canal preparation of flattened root canals
In this research it was evaluated the influence of the last apical instrument of the ProTaper system associated or not with the 2.5% sodium hypochlorite in the cleanness and shaper of flattened root canals. For this study 32 mandibular central incisors were used, gotten in the tooth bank of University of Joinville, which had been divided in six experimental
Publicado em: 2005
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34. Environmental diagnostic and temporal analysis of the suitability of the land use and land cover in the Ribeirão dos Marins basin, Piracicaba - SP / Diagnóstico ambiental e análise temporal da adequabilidade do uso e cobertura do solo na bacia do Ribeirão dos Marins, Piracicaba - SP
The environmental diagnostic and the analysis of the occupation suitability allows the identification of more critical areas according to its degradation level, being extremely important for the establishment of preservation, conservation and recovery measures. An environmental diagnostic and suitability analysis of the land use and land cover of the Ribei
Publicado em: 2005
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35. AnÃlise tÃcnico-econÃmica do cultivo do arroz no perÃmetro irrigado Morada Nova, CearÃ. / Technician-economic analysis of the culture of rice (Oryza sativa L.) in the Morada Nova Irrigation District, CearÃ.
The main objective of this study was to determine the water use efficiency, the economic efficiency and the profit indexes for rice (Oryza sativa, L.) in the Morada Nova Irrigation District, state of CearÃ, Brazil, from July to December, 2003. EPAGRI 109 cultivar was cropped in three different soil units: sandyloam, silt and clay loam, the last two called u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/07/2004
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36. Irrigação por infiltração com efluente de lagoa anaerobia em solo cultivado com milho (Zea mays L.)
The experiment was conducted around of a Sewage Treatment Plant located in Limeira city, São Paulo, Brazil. This research had the proposal to reuse the domestic effluent treated in an anaerobic lagoon, that present a BOD removal efficiency of 50%. The main objective was the determination of application rates of effluent in the soil according to sanitary and
Publicado em: 2004