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	Provedor de dados Rev. Bras. Ciênc. Solo (3) Autor Taboada,Miguel Angel (3) Alvarez,Carina Rosa (1) Bustingorri,Carolina (1) Fernandez,Patricia Lilia (1) Figueiro Aureggi,Santiago Andrés (1) Micucci,Federico Guillermo (1) Noemi Cosentino,Vanina Rosa (1) Álvarez,Carina Rosa (1) Mais... Palavra-chave Soil compaction (2) Climate change (1) Conventional tillage (1) GHG sampling (1) Root growth (1) Soil N2O fluxes (1) Soil organic carbon (1) Soil texture (1) Zero tillage (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2012 (1) 2010 (1) 2008 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última N2O emissions from a cultivated mollisol: optimal time of day for sampling and the role of soil temperature Rev. Bras. Ciênc. Solo Noemi Cosentino,Vanina Rosa; Fernandez,Patricia Lilia; Figueiro Aureggi,Santiago Andrés; Taboada,Miguel Angel. The correct use of closed field chambers to determine N2O emissions requires defining the time of day that best represents the daily mean N2O flux. A short-term field experiment was carried out on a Mollisol soil, on which annual crops were grown under no-till management in the Pampa Ondulada of Argentina. The N2O emission rates were measured every 3 h for three consecutive days. Fluxes ranged from 62.58 to 145.99 ∝g N-N2O m-2 h-1 (average of five field chambers) and were negatively related (R² = 0.34, p < 0.01) to topsoil temperature (14 - 20 ºC). N2O emission rates measured between 9:00 and 12:00 am presented a high relationship to daily mean N2O flux (R² = 0.87, p < 0.01), showing that, in the study region, sampling in the mornings is preferable... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil N2O fluxes; Climate change; GHG sampling. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600015 Pedotransfer functions to estimate proctor test parameters under different tillage systems Rev. Bras. Ciênc. Solo Álvarez,Carina Rosa; Micucci,Federico Guillermo; Bustingorri,Carolina; Taboada,Miguel Angel. The Proctor test is time-consuming and requires sampling of several kilograms of soil. Proctor test parameters were predicted in Mollisols, Entisols and Vertisols of the Pampean region of Argentina under different management systems. They were estimated from a minimum number of readily available soil properties (soil texture, total organic C) and management (training data set; n = 73). The results were used to generate a soil compaction susceptibility model, which was subsequently validated using a second group of independent data (test data set; n = 24). Soil maximum bulk density was estimated as follows: Maximum bulk density (Mg m-3) = 1.4756 - 0.00599 total organic C (g kg-1) + 0.0000275 sand (g kg-1) + 0.0539 management. Management was equal to 0 for... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil organic carbon; Soil compaction; Soil texture. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600002 Root abundance of maize in conventionally-tilled and zero-tilled soils of Argentina Rev. Bras. Ciênc. Solo Taboada,Miguel Angel; Alvarez,Carina Rosa. Maize root growth is negatively affected by compacted layers in the surface (e.g. agricultural traffic) and subsoil layers (e.g. claypans). Both kinds of soil mechanical impedances often coexist in maize fields, but the combined effects on root growth have seldom been studied. Soil physical properties and maize root abundance were determined in three different soils of the Rolling Pampa of Argentina, in conventionally-tilled (CT) and zero-tilled (ZT) fields cultivated with maize. In the soil with a light Bt horizon (loamy Typic Argiudoll, Chivilcoy site), induced plough pans were detected in CT plots at a depth of 0-0.12 m through significant increases in bulk density (1.15 to 1.27 Mg m-3) and cone (tip angle of 60 º) penetrometer resistance (7.18 to 9.37... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zero tillage; Conventional tillage; Soil compaction; Root growth. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000200031 Registros recuperados: 3 Primeira ... 1 ... Última

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