Primary Productivity
Mostrando 13-24 de 146 artigos, teses e dissertações.
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13. Analysis of options of production and access ways in underground mines
Abstract This article aims to review the issues to be considered in choosing primary access and transportation options for underground mines. The main accesses to underground orebodies are declines or vertical shafts. They serve both as a way to transport ore or waste, and move people, equipment or supplies. In underground mines, the ore transport option sig
REM, Int. Eng. J.. Publicado em: 2017-06
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14. Research on Phosphorus Removal in Artificial Wetlands by Plants and Their Photosynthesis
ABSTRACT Urban rainfall runoff pollution has become a major reason for water eutrophication problem in the process of urbanization in China, while phosphorus is a significant restrictive factor that influences primary productivity of freshwater system. It's rather significant to conduct phosphorus control in waste water with engineering measures. This resear
Braz. arch. biol. technol.. Publicado em: 20/10/2016
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15. Effects of forest structure on litter production, soil chemical composition and litter-soil interactions
ABSTRACT Litter production in forest ecosystems is a major indicator of primary productivity because litter helps incorporate carbon and nutrients from plants into the soil and is directly involved in plant-soil interactions. To our knowledge, few studies have investigated the relationship between species diversity and ecosystem processes in subtropical fore
Acta Bot. Bras.. Publicado em: 04/07/2016
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16. Options, challenges and potentials of poultry meat: an empirical investigation on european consumers
Agricultural market developments have attracted considerable attention recently, due to increasing consumer food prices and sharp short term price fluctuations of agricultural commodity prices. This medium term outlook provides a projection for major EU agricultural commodity markets and agricultural income until the year 2022, based on a set of coherent ass
Rev. Bras. Cienc. Avic.. Publicado em: 2014-12
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17. Clay content drives carbon stocks in soils under a plantation of Eucalyptus saligna Labill. in southern Brazil
Soil carbon accumulation is largely dependent on net primary productivity. To our knowledge, there have been no studies investigating the dynamics of carbon accumulation in weathered subtropical soils, especially in managed eucalyptus plantations. We quantified the seasonal input of leaf litter, the leaf decomposition rate and soil carbon stocks in an commer
Acta Bot. Bras.. Publicado em: 2014-06
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18. Determinants of feedlot adoption by beef cattle farmers in the state of São Paulo
The objective of this study was to identify the factors determining the adoption of feedlot by beef cattle farmers in the state of São Paulo, Brazil. For this purpose, primary data were collected among a sample of 84 farmers. The data were analyzed using descriptive statistics and a logit model. The analysis showed that the variables which increase the like
R. Bras. Zootec.. Publicado em: 2013-11
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19. Strawberry yield efficiency and its correlation with temperature and solar radiation
The impact that future climatic conditions will have on agricultural productivity depends on the sensitivity to each environmental factor and relative changes in temperature, precipitation and UV-B radiation. The strawberry (Fragaria x ananassa) is a microclimatic crop cultivated almost worldwide and Spain is the world's second-largest strawberry producer af
Hortic. Bras.. Publicado em: 2013-03
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20. Análise da gestão do orçamento de vendas com a utilização do business intelligence: o caso Barilla
Sales management in companies in a competitive and turbulent environment requires the use of management tools that can provide information that enables quick decisions to bring improvements in performance. The optimization of information flow associated with new information technologies can transform the business and also generate an organizational change th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2012
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21. ÍNDICE RELATIVO DE CLOROFILA PARA O DIAGNÓSTICO DO ESTADO DE NITROGÊNIO EM HÍBRIDOS DE MILHO
Nitrogen (N) is the nutrient that contributes the most to increase productivity of corn hybrids. For this reason, the main objective of this study is to determine the relative chlorophyll index (RCI), in different leaves and phenological stages, aiming diagnosing N state in corn hybrids according to the N doses applied in coverage, correlating them with the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2012
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22. A dinâmica produtiva dos APL S do "corredor da moda" : uma análise do período de 1995 a 2010
The aim of this thesis was to analyze the dynamics of APL s production of "Fashions racer" and its implications for economic growth in the sector and the regions north and northwest of Paraná. The methodology used in this study was based on a survey of primary and secondary information, carried out in two steps. The first refers to the characterization of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2012
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23. Monitoramento das pastagens cultivadas no cerrado goiano a partir de imagens MODIS índices de vegetação (MOD13Q1) / Monitoring cultivated pastures in the Cerrado Goiano Image from MODIS vegetation index (MOD13Q1)
Cattle ranching is extremely important for the economy of Brazil. This activity is characterized by the intensive explotation of pastures, which occupy a vast area of the Brazilian territory, i.e. approximately 150 million hectares. Currently, Brazil is the largest meat exporter in the world. Concerning its biomes, this occupation occurs mainly in the Cerrad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012
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24. Monitoramento das pastagens cultivadas no cerrado goiano a partir de imagens MODIS índices de vegetação (MOD13Q1) / Monitoring cultivated pastures in the Cerrado Goiano Image from MODIS vegetation index (MOD13Q1)
A pecuária é uma atividade extremamente importante para a economia do Brasil. Essa atividade se caracteriza pela exploração extensiva das pastagens, ocupando vasta área do território, aproximadamente 150 milhões de hectares. Atualmente, o Brasil é o maior exportador de carne bovina no mundo. Em relação aos biomas brasileiros, essa ocupação ocorre
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012