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	Provedor de dados Chilean J. Agric. Res. (2) Autor Monreal,Carlos (2) Estrada,Isabel (1) Etchevers,Jorge (1) Fuentes,Mariela (1) Hidalgo,Claudia (1) Matus,Francisco (1) Muñoz,Cristina (1) Paulino,Leandro (1) Zagal,Erick (1) Mais... Palavra-chave Carbon dioxide (1) Denitrification (1) Global warming (1) Nitrification (1) Nitrous oxide (1) SOM saturation (1) Sand-size (1) Soil C and N (1) Soil biological processes (1) Soil organic carbon (1) Ultrasonic dispersion (1) Mais... Tipo do documento Journal article (2) Ano 2011 (1) 2010 (1) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Greenhouse Gas (CO2 AND N2O) Emissions from Soils: A Review Chilean J. Agric. Res. Muñoz,Cristina; Paulino,Leandro; Monreal,Carlos; Zagal,Erick. In agricultural activities, the main greenhouse gases (GHG) are those related to C and N global cycles. The impact of agriculture on GHG emissions has become a key issue, especially when considering that natural C and N cycles are influenced by agricultural development. This review focuses on CO2 and N2O soil emissions in terrestrial ecosystems, with emphasis in Chilean and similar agro-ecosystems around the world. The influence of land use and crop management practices on CO2 and N2O emissions is analyzed; some mitigation measures to reduce such emissions are also discussed here. More knowledge on the biological processes that promote of GHG emissions from soil will allow creating opportunities for agricultural development under friendly-environmental... Tipo: Journal article Palavras-chave: Global warming; Carbon dioxide; Nitrous oxide; Soil biological processes; Soil organic carbon; Nitrification; Denitrification. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300016 Land use impacts on physical-based soil organic matter fractions on three hillside Ferrasols in Mexico Chilean J. Agric. Res. Matus,Francisco; Hidalgo,Claudia; Monreal,Carlos; Estrada,Isabel; Fuentes,Mariela; Etchevers,Jorge. The effects of cultivation in hillside (> 30% slope) on soil C and N stocks after forest clearance and subsequent cultivation in new re-growth forest sites not always induce rapid soil organic matter (SOM) loss in subtropical areas. In the present study we evaluated the sensitivity to SOM changes of material floatable in water (Fw), coarse sand (> 250 mm), fine sand (50-250 mm), silt (2-50 mm) and clay (0-2 mm) fractions by the impact of cultivation of Mexican Ferrasols. This research also determined the relative degree of C and N saturation in the silt and clay size particles. The soil physical fractions were obtained after ultrasonic vibration and sedimentation. Soil organic matter stock (0-20 cm depth) in cultivated sites ranged from 54 to 146 Mg... Tipo: Journal article Palavras-chave: Soil C and N; Sand-size; SOM saturation; Ultrasonic dispersion. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200014 Registros recuperados: 2 Primeira ... 1 ... Última

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