Data/hora: 10/06/2024 06:46:54

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Physical properties of a humic cambisol under tillage and cropping systems after twelve years	
Autores: 	Andrade,Andréia Patrícia; Mafra,Álvaro Luiz; Baldo,Gizele Rejane; Piccolla,Cristiano Dela; Bertol,Ildegardis; Albuquerque,Jackson Adriano.	
Data: 	2010-02-01	
Ano: 	2010	
Palavras-chave: 	Crop rotation; Crop succession; No-tillage; Soil management.	
Resumo: 	Soil is the basis underlying the food production chain and it is fundamental to improve and conserve its productive capacity. Imbalanced exploitation can degrade agricultural areas physical, chemical and biologically. The objective of this study was to evaluate some soil physical properties and their relation with organic carbon contents of a Humic Dystrudept under conventional tillage (CT) and no-tillage (NT), for 12 years in rotation (r) and succession (s) cropping systems. The experiment was carried out in Lages, SC (latitude 27 º 49 ' S and longitude 50 º 20 ' W, 937 m asl), using crop sequences of bean-fallow-maize-fallow-soybean in conventional tillage rotation; maize-fallow in conventional tillage succession; bean-oat-maize-turnip-soybean-vetch in no-tillage rotation; and maize-vetch in no-tillage succession. The experimental design was completely randomized with four replications. The soil samples were collected in the layers 0-2.5, 2.5-5, 5-10, and 10-20 cm. The following properties were analyzed: soil density, porosity, aggregate stability, degree of flocculation, water retention, infiltration, mechanical strength, and total organic carbon. Soil aggregation in the surface layer (0-5 cm) was better in the no-tillage than the conventional system, related to higher microporosity, organic carbon contents and water retention capacity, indicating that a periodical tillage of this soil is unnecessary. Infiltration was highest in no-tillage with crop succession.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000100022	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832010000100022	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.34 n.1 2010	
Fonte: 	info:eu-repo/semantics/openAccess