Energy Crops
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. RESIDUAL BIOMASSES IN THE MICRO-REGION OF DOURADOS (MS): ASSESSMENT AND AVAILABILITY FOR ENERGY IN AGRICULTURE THERMAL CONVERSION
ABSTRACT This research presents results of the assessment of solid biofuels (residual biomasses from agricultural crops) in the state of Mato Grosso do Sul, in the period 2007-2012, for energy in agricultural uses. It is pointed out the available quantity, its geographic location at micro and meso regions and energy conversion potential. The methodology is b
Eng. Agríc.. Publicado em: 2017-06
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14. Rice husk ash as filler in tread compounds to improve rolling resistance
Abstract In the tire industry carbon black is being replaced by silica as a filler in recent due to the development of “green tires”. Amorphous precipitated silica in combination with a silane coupling agent as a filler in tread compounds can result in fuel savings of 3% to 4% compared to a tire having treads made from compounds with carbon black. This m
Polímeros. Publicado em: 2017-03
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15. Energy embodiment in Brazilian agriculture: an overview of 23 crops
The amount of energy required to produce a commodity or to supply a service varies from one production system to another and consequently giving rise to differing levels of environmental efficiency. Moreover, since energy prices have been continuously increasing over time, this energy amount may be a factor that has economic worth. Biomass production has a v
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-12
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16. Comparison of carbon sequestration potential in agricultural and afforestation farming systems
In the last few decades, many forests have been cut down to make room for cultivation and to increase food or energy crops production in developing countries. In this study, carbon sequestration and wood production were evaluated on afforested farms by integrating the Gaussian diameter distribution model and exponential diameter-height model derived from sam
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-04
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17. Use of sorghum straw (Sorghum bicolor) for second generation ethanol production: pretreatment and enzymatic hydrolysis
Agronomic biomass yields of forage sorghum BRS 655 presented similar results to other energy crops, producing 9 to 12.6 tons/ha (dry mass) of sorghum straw. The objective of this study was to evaluate the lignocellulosic part of this cultivar in terms of its potential in the different unit processes in the production of cellulosic ethanol, measuring the effe
Quím. Nova. Publicado em: 2013
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18. DECOMPOSIÇÃO DE RESÍDUOS CULTURAIS DE PLANTAS DE COBERTURA DE SOLO E EMISSÕES DE ÓXIDO NITROSO / COVER CROPS RESIDUES DECOMPOSITION AND NITROUS OXIDE EMISSIONS
The inclusion of summer cover crops (SCC) in the no-till system is an interesting alternative to promote the addition of elevated quantities of plant biomass and nitrogen (N) to the soil. The C and N dynamics during the SCC residue decomposition can control the nitrous oxide (N2O) fluxes to the atmosphere. This study was carried out to quantify the SCC resid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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19. Agricultura familiar e expansão da cana-de-açúcar sobre áreas de culturas anuais no Estado de Goiás a partir da safra 2005/06 / Family farming and sugarcane expansion over areas of annual crops in Goiás State from the 2005/06 harvesting season
Sugarcane ethanol, considered a major source of clean energy, is an option for changing the energy matrix of Brazil and also the world, contributing to the reduction in consumption of fossil fuels. In Brazil, Goiás State is one of the sugarcane expansion s frontiers to meet the growing demand for biofuels. But this expansion means sugarcane mills could take
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2012
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20. Mechanized methods for harvesting residual biomass from Mediterranean fruit tree cultivations
This study evaluates the technology and work systems used in order to harvest residual biomass from pruning in the specific conditions of Mediterranean fruit orchards (narrow distances between crop-rows). Harvesting has been divided into several types of operations - pruning, biomass alignment between crop tracks, biomass concentration in piles, chipping and
Scientia Agricola. Publicado em: 2012-06
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21. Atributos físicos do solo, produção de biomassa e balanço energético em sistema de integração lavoura-pecuária leiteira sob plantio direto / Soil physical attributes, production of biomass and energy balance in system integration crop livestock dairy in tillage
The integrated crop-livestock allow a series of advantages, but the intensive land use without technical criteria regarding the grazing pressure and machinery traffic can bring damage to soil physical quality, as manifested by compression. In these more intensive systems of production there is growing concern in relation to energy balance. The large amount o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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22. Abordagem sistêmica aplicada aos complexos agroindustriais da soja e do algodão no território do extremo oeste da Bahia / Systemic approach applied to agrobusiness complexes of soy and cotton in the territory of the extreme West of Bahia
The present study focues to analyse the changes of geosystem of western of Bahia in consequence of anthropic action, since innovative inputs from system by introduction of soya and cotton crops. In order to understand the new spatial organization of Barreiras, Correntina, Luís Eduardo Magalhães e São Desidério Citys, since 1970. The quantitative paramete
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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23. SURFACE ENERGY FLUXES ESTIMATES USING NOAH LAND SURFACE MODEL MODIFIED FOR FLOODING CROPS / ESTIMATIVA DOS FLUXOS DE ENERGIA SUPERFICIAIS UTILIZANDO O MODELO DE SUPERFÍCIE NOAH MODIFICADO PARA CULTURAS ALAGADAS
No presente trabalho, quantifica-se a distribuição sazonal e anual das componentes do balanço de energia (fluxos de calor sensível, latente, do solo e saldo de radiação) em um ecossistema de arroz irrigado por inundação localizado no Sul do Brasil para três períodos distintos ao longo do ano (Pousio 1: 22Jul2003 a 24Nov2003; Arroz: 25Nov2003 a 04Ab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2011
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24. Variabilidade espacial de atributos fÃsicos e quÃmicos de um Latossolo argiloso correlacionados ao rendimento de grÃos da cultura do Crambe (Crambe abyssinica Hochst) / Spatial variability of physical and chemical attributes of a clayey oxisol correlated to grain yield of crop Crambe (Crambe abyssinica Hochst)
O objetivo deste trabalho foi verificar, com auxÃlio de mapas temÃticos obtidos atravÃs da interpolaÃÃo por krigagem, a existÃncia de correlaÃÃo de atributos fÃsicos e quÃmicos com a produtividade da cultura do crambe (Crambe abyssinica Hochst) em Latossolo argiloso sob sistema de plantio direto. Para tanto, conduziu-se a pesquisa em Ãrea experime
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/07/2011