Nitrogen In Agriculture
Mostrando 25-36 de 99 artigos, teses e dissertações.
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25. Da escassez ao estresse do planeta: um século de mudanças no ciclo do nitrogênio
Heavy metals and pesticides are usually associated with the main problems humankind has created in the natural environment. However, compounds with characteristics of essential macronutrients are causing serious environmental changes that could intensify, compromising the diversity of life on the planet. This is the case of nitrogen compounds, produced by in
Quím. Nova. Publicado em: 2013
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26. Caracterização ambiental e estimativa da produção de cargas difusas da área de drenagem da represa de Itupararanga, SP / Environmental characterization and estimative of diffuse pollution of Itupararanga watershed, SP
The use of satellite images has improved the study of the land use dynamics. Land cover mapping have become fundamental tools in the assessment of landscape changes caused by human action and its influence on regional and urban planning. Computation tools such as Geographic Information Systems and hydrological models have supported these findings. The hydrol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2012
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27. Influência da estrutura da vegetação de um fragmento florestal nas características físicas e químicas da água e no funcionamento do ecossistema de um córrego rural
Riparian ecosystems are being rapidly degraded due to deforestation for conversion of natural areas to agriculture, pasture, and urban development. In rural areas, riparian forest remnants can be very important for biodiversity conservation and for the maintenance and improvement of water physical and chemical characteristics as the deforested stream passes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/05/2012
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28. Densidade de plantas e doses de nitrogênio em cobertura na cultura do milho sob espaçamento reduzido
O trabalho tem como objetivo avaliar o efeito de densidades de plantas e doses de adubação nitrogenada em cobertura sobre as características agronômicas e a produtividade de grãos na cultura do milho sob espaçamento reduzido. Foram realizados dois experimentos independentes para cada época de cultivo. O de primeira safra foi implantado nos anos agríc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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29. Inclusão de grão de milheto em dietas de alto concentrado para ovinos em confinamento / Inclusion of a grain of corn in diets high concentrate for sheep in confinement
The ovine production is an activity that has developed gradually in the country, and growing in areas where before the sheep industry was negligible, enabling livestock production systems in small, medium and large farms and becoming a more profitable alternative investment means in agriculture, when compared with other agricultural as for example, beef catt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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30. Multilocus sequence analysis (MLSA) of Bradyrhizobium strains: revealing high diversity of tropical diazotrophic symbiotic bacteria
Symbiotic association of several genera of bacteria collectively called as rhizobia and plants belonging to the family Leguminosae (=Fabaceae) results in the process of biological nitrogen fixation, playing a key role in global N cycling, and also bringing relevant contributions to the agriculture. Bradyrhizobium is considered as the ancestral of all nitroge
Brazilian Journal of Microbiology. Publicado em: 2012-06
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31. Assessing biophysical variable parameters of bean crop with hyperspectral measurements
Recently high spectral resolution sensors have been developed, which allow new and more advanced applications in agriculture. Motivated by the increasing importance of hyperspectral remote sensing data, the need for research is important to define optimal wavebands to estimate biophysical parameters of crop. The use of narrow band vegetation indices (VI) der
Scientia Agricola. Publicado em: 2012-04
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32. Software para definiÃÃo e avaliaÃÃo de unidades de manejo em Agricultura de precisÃo / Software for definition and evaluation of management zones in Precision agriculture
Water and soil conservation is essential for water resources management. Thus, conservationist actions are developed and applied in order to make part of a set of measures which enable the supply management, based on an appropriate recharge of the aquifers as well as the improvement of their quality, from the reduction of erosive processes and volume of effl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2011
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33. Nitrogênio e potássio via fertirrigação na produção do morangueiro / Nitrogen and potassium fertigation on the strawberry production
Small fruits have attracted the attention of producers and worldwide consumer market and the strawberry is one of the most important representatives of this group. In Brazil, strawberry crop is showing its importance in area and economy. Research works about this plant are few in the country, and thus, it is very important to develop further researches about
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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34. Parcelamento da adubação nitrogenada de cobertura em cultivares de trigo com diferentes qualidades industriais
A disponibilidade do nitrogênio é um dos fatores mais importantes nos processos de crescimento e desenvolvimento das plantas e os genótipos de trigo apresentam respostas diferenciadas à adubação nitrogenada. O trabalho teve por objetivo avaliar o efeito de diferentes proporções de parcelamento da adubação nitrogenada em cobertura no comportamento a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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35. Density and diversity of diazotrophic bacteria isolated from Amazonian soils using N-free semi-solid media
Non-symbiotic diazotrophic bacteria are amongst the most important functional groups of soil-dwelling microorganisms. These bacteria contribute to plant growth predominantly through biological N2 fixation. Here, we evaluated the density and diversity of non-symbiotic diazotrophic bacteria in soils taken from diverse land use systems (LUS) in Amazonia using n
Scientia Agricola. Publicado em: 2011-10
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36. Triple inoculation with Bradyrhizobium, Glomus and Paenibacillus on cowpea (Vigna unguiculata [L.] walp.) development
The use of microorganisms to improve the availability of nutrients to plants is of great importance to agriculture. This study aimed to evaluate the effect of triple inoculation of cowpea with arbuscular mycorrhizal fungi (AMF), plant growth-promoting bacteria (PGPB) and rhizobia to maximize biological nitrogen fixation (BNF) and promote plant growth. The ex
Brazilian Journal of Microbiology. Publicado em: 2011-09