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	Provedor de dados Chilean J. Agric. Res. (1) Bragantia (1) Autor Estrada,Isabel (1) Etchevers,Jorge (1) Foggiato,William Saidelles (1) Fuentes,Mariela (1) Hidalgo,Claudia (1) Mallmann,Micael Stolben (1) Matus,Francisco (1) Monreal,Carlos (1) Pereira,Monike Andrade (1) Pons,Sarah Severo (1) Reichert,José Miguel (1) Reinert,Dalvan José (1) Silva,Érika Andressa da (1) Mais... Palavra-chave Ultrasonic dispersion (2) Aggregation models (1) Grasses (1) Leguminous (1) SOM saturation (1) Sand-size (1) Soil C and N (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Journal article (1) Ano 2019 (1) 2011 (1) País Brazil (1) Chile (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Soil conservation management with cover crops: effects on critical energy levels, release and dispersion of aggregates Bragantia Silva,Érika Andressa da; Reinert,Dalvan José; Reichert,José Miguel; Mallmann,Micael Stolben; Pereira,Monike Andrade; Pons,Sarah Severo; Foggiato,William Saidelles. ABSTRACT The normalized dispersion index (NDI) and the b/a index are commonly used to express the stability of aggregates measured by ultrasound. However, few studies have used the critical energy (CE) extracted from modeling to explain the effects of soil use and management on soil aggregation. The objective of this study was to evaluate the influence of soil cover on the CE level required for dispersion of aggregates of a Typic Hapludalf. Soil samples collected from the 0.0-0.05 m depth were evaluated in five different managements with cover plants: perennial soybean (PS), peanuts (P), spontaneous vegetation (SV), black oat/forage turnip (BOFT), and black oat/hairy vetch (BOHV). Aggregates ? 2 mm of the treatments were exposed to ultrasonic irradiation... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ultrasonic dispersion; Aggregation models; Leguminous; Grasses. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300444 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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