Stock Accumulation
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Soil carbon accumulation in cotton production systems in the Brazilian Cerrado
ABSTRACT. Sustainable production systems, such as the no-tillage system (NTS), have a tendency to increase organic carbon in the soil. However, in Brazilian cotton production, the conventional tillage system (CTS) is predominant, and long-term studies on cotton crop under the NTS are scarce. The present study aimed to evaluate the effect of soil management a
Acta Sci., Agron.. Publicado em: 21/10/2019
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2. Soil carbon stock and humification in pastures under different levels of intensification in Brazil
ABSTRACT: Intensive management of tropical pastures has shown potential for greenhouse gas (GHG) mitigation due to high forage production and C accumulation in the soil. This study aimed to evaluate different pasture management options in relation to their effect on soil C stocks and soil organic matter (SOM) humification. Pastures in four beef cattle produc
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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3. Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining
ABSTRACT Revegetation is essential to improve the quality of constructed soils. This study investigated effects of perennial grasses on total organic carbon (TOC) stock, organic matter (OM) fractions and on quality of a recently constructed soil, after coal mining. Soil samples were collected from the 0.00-0.03 m layer two years after the beginning of the ex
Rev. Bras. Ciênc. Solo. Publicado em: 25/07/2016
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4. Identifying forest ecosystem regions for agricultural use and conservation
ABSTRACT Balancing agricultural needs with the need to protect biodiverse environments presents a challenge to forestry management. An imbalance in resource production and ecosystem regulation often leads to degradation or deforestation such as when excessive cultivation damages forest biodiversity. Lack of information on geospatial biodiversity may hamper f
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
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5. Water-Stable Aggregates and Associated Carbon in a Subtropical Rice Soil Under Variable Tillage
ABSTRACT Tillage systems can influence C sequestration by changing aggregate formation and C distribution within the aggregate. This study was undertaken to explore the impact of no-tillage without straw (NT-S) and with straw (NT+S), and moldboard plow without straw (MP-S) and with straw (MP+S), on soil aggregation and aggregate-associated C after six years
Rev. Bras. Ciênc. Solo. Publicado em: 2016
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6. 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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7. Agroforestry systems, nutrients in litter and microbial activity in soils cultivated with coffee at high altitude
Agroforestry systems are an alternative option for sustainable production management. These systems contain trees that absorb nutrients from deeper layers of the soil and leaf litter that help improve the soil quality of the rough terrain in high altitude areas, which are areas extremely susceptible to environmental degradation. The aim of this study was to
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-04
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8. Carbon stock and humification index of organic matter affected by sugarcane straw and soil management
The maintenance of sugarcane (Saccharum spp.) straw on a soil surface increases the soil carbon (C) stocks, but at lower rates than expected. This fact is probably associated with the soil management adopted during sugarcane replanting. This study aimed to assess the impact on soil C stocks and the humification index of soil organic matter (SOM) of adopting
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-10
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9. A gerência recente do endividamento público brasileiro
The recente Brazilian public management. We use two frameworks to analyze the recent Brazilian public debt management. The first one encompasses the Brazilian optimal public debt management analysis through the examination of the correlations among the main variables to which the public debt is indexed. The second seeks to address the consequences of recent
Brazilian Journal of Political Economy. Publicado em: 2012-06
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10. Matéria orgânica e atributos químicos em solo de tabuleiros costeiros sob diferentes coberturas vegetais / Organic matter and chemical attributes of an Coastal Tableland soil under different vegetation covers
The conversion of native vegetation in agricultural and forest crops results in changes in soil properties. The aimed was to assess the dynamic attributes of a Yellow Oxisol under differents vegetation covers in the Coastal Tableland. Soil samples were collected at depths of 0-10, 10-20 and 20-40 cm in June 2011 in Sooretama, ES, considering four soil vegeta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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11. Crescimento, fronteira tecnológica e a hipótese da relatividade do capital humano / Growth, technological frontier and the relative importance of human capital
In recent years several studies have emphasized the importance of human capital for economic development. However, many of these studies have not incorporated the different stages of development to which the economies are found. In this sense, different degrees of proximity to the technological frontier induce the results of economic policy, so that the glob
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/11/2011
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12. Dinâmica do carbono e fluxo de gases do efeito estufa em sistemas de integração lavoura-pecuária na Amazônia e no Cerrado / Carbon dynamics and greenhouse gas fluxes in integrated crop-livestock systems in Amazonia and Cerrado
Changes on land use and management influence the accumulation of carbon (C) in soil and the greenhouse gas (GHG) fluxes. In Brazil, especially in Amazonia and Cerrados biomes, the native vegetation has been historically converted in pastures and agriculture causing considerable amount of GHG emissions to the atmosphere. Recently, pastures and agricultural ac
Publicado em: 2010