Data/hora: 16/06/2024 04:09:48

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Soil tillage systems: changes in soil structure and crop response	
Autores: 	Mazurana,Michael; Levien,Renato; Müller,Jônatan; Conte,Osmar.	
Data: 	2011-08-01	
Ano: 	2011	
Palavras-chave: 	Soil bulk density; Soil resistance to penetration; Soil porosity.	
Resumo: 	The introduction and intensification of no-tillage systems in Brazilian agriculture in recent decades have created a new scenario, increasing concerns about soil physical properties. The objective of this study was to assess the effects of different tillage systems on some physical properties of an Ultisol previously under native grassland. Five tillage methods were tested: no-tillage (NT), chiseling (Ch), no-tillage with chiseling every two years (NTCh2), chiseling using an equipment with a clod-breaking roller (ChR) and chiseling followed by disking (ChD). The bulk density, macroporosity, microporosity and total porosity, mechanical resistance to penetration, water infiltration into the soil and crop yields were evaluated. The values of soil bulk density, mechanical resistance to penetration and microporosity increased as macroporosity decreased. Soil bulk density was lower in tillage systems with higher levels of tillage/soil mobilization; highest values were observed in NT and the lowest in the ChD system. The water infiltration rate was highest in the ChR system, followed by the systems ChD, NT and NTCh2, while crop yields were higher in systems with less soil mobilization.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400013	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832011000400013	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.35 n.4 2011	
Fonte: 	info:eu-repo/semantics/openAccess