Data/hora: 05/06/2024 10:29:02

Provedor de dados: 	70	
País: 	Brazil	
Título: 	Soil penetration resistance analysis by multivariate and geostatistical methods	
Autores: 	Medina,Cecilia; Camacho-Tamayo,Jesús H.; Cortés,César A.	
Data: 	2012-02-01	
Ano: 	2012	
Palavras-chave: 	Compaction; Cluster analysis; Principal components; Andisol.	
Resumo: 	The penetration resistance (PR) is a soil attribute that allows identifies areas with restrictions due to compaction, which results in mechanical impedance for root growth and reduced crop yield. The aim of this study was to characterize the PR of an agricultural soil by geostatistical and multivariate analysis. Sampling was done randomly in 90 points up to 0.60 m depth. It was determined spatial distribution models of PR, and defined areas with mechanical impedance for roots growth. The PR showed a random distribution to 0.55 and 0.60 m depth. PR in other depths analyzed showed spatial dependence, with adjustments to exponential and spherical models. The cluster analysis that considered sampling points allowed establishing areas with compaction problem identified in the maps by kriging interpolation. The analysis with main components identified three soil layers, where the middle layer showed the highest values of PR.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100010	
Editor: 	Associação Brasileira de Engenharia Agrícola	
Relação: 	10.1590/S0100-69162012000100010	
Formato: 	text/html	
Fonte: 	Engenharia Agrícola  v.32 n.1 2012	
Fonte: 	info:eu-repo/semantics/openAccess