Data/hora: 06/06/2024 03:05:30

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Soil aggregation under different management systems	
Autores: 	Portella,Cibele Mascioli Rebello; Guimarães,Maria de Fátima; Feller,Christian; Fonseca,Inês Cristina de Batista; Tavares Filho,João.	
Data: 	2012-12-01	
Ano: 	2012	
Palavras-chave: 	Aggregation indices; Aggregate size classes; Total organic carbon.	
Resumo: 	Considering that the soil aggregation reflects the interaction of chemical, physical and biological soil factors, the aim of this study was evaluate alterations in aggregation, in an Oxisol under no-tillage (NT) and conventional tillage (CT), since over 20 years, using as reference a native forest soil in natural state. After analysis of the soil profile (cultural profile) in areas under forest management, samples were collected from the layers 0-5, 5-10, 10-20 and 20-40 cm, with six repetitions. These samples were analyzed for the aggregate stability index (ASI), mean weighted diameter (MWD), mean geometric diameter (MGD) in the classes &amp;gt; 8, 8-4, 4-2, 2-1, 1-0.5, 0.5-0.25, and &lt; 0.25 mm, and for physical properties (soil texture, water dispersible clay (WDC), flocculation index (FI) and bulk density (Bd)) and chemical properties (total organic carbon - COT, total nitrogen - N, exchangeable calcium - Ca2+, and pH). The results indicated that more intense soil preparation (M &lt; NT &lt; PC) resulted in a decrease in soil stability, confirmed by all stability indicators analyzed: MWD, MGD, ASI, aggregate class distribution, WDC and FI, indicating the validity of these indicators in aggregation analyses of the studied soil.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600021	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832012000600021	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.36 n.6 2012	
Fonte: 	info:eu-repo/semantics/openAccess