Data/hora: 01/06/2024 04:48:21

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Modelling of soil penetration resistance for an oxisol under no-tillage	
Autores: 	Tavares Filho,João; Feltran,Clarissa Tieme Matsuda; Oliveira,José Francirlei de; Almeida,Edinei de.	
Data: 	2012-02-01	
Ano: 	2012	
Palavras-chave: 	No-till; Compaction; Physical properties; Organic matter.	
Resumo: 	Soil penetration resistance is an important property that affects root growth and elongation and water movement in the soil. Since no-till systems tend to increase organic matter in the soil, the purpose of this study was to evaluate the efficiency with which soil penetration resistance is estimated using a proposed model based on moisture content, density and organic matter content in an Oxisol containing 665, 221 and 114 g kg-1 of clay, silt and sand respectively under annual no-till cropping, located in Londrina, Paraná State, Brazil. Penetration resistance was evaluated at random locations continually from May 2008 to February 2011, using an impact penetrometer to obtain a total of 960 replications. For the measurements, soil was sampled at depths of 0 to 20 cm to determine gravimetric moisture (G), bulk density (D) and organic matter content (M). The penetration resistance curve (PR) was adjusted using two non-linear models (PR = a Db Gc and PR' = a Db Gc Md), where a, b, c and d are coefficients of the adjusted model. It was found that the model that included M was the most efficient for estimating PR, explaining 91 % of PR variability, compared to 82 % of the other model.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100010	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832012000100010	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.36 n.1 2012	
Fonte: 	info:eu-repo/semantics/openAccess