Data/hora: 11/06/2024 11:15:44

Provedor de dados: 	90	
País: 	Brazil	
Título: 	SPATIAL DEPENDENCE OF ELECTRICAL CONDUCTIVITY AND CHEMICAL PROPERTIES OF THE SOIL BY ELECTROMAGNETIC INDUCTION	
Autores: 	Machado,Flavia Cristina; Montanari,Rafael; Shiratsuchi,Luciano Shozo; Lovera,Lenon Henrique; Lima,Elizeu de Souza.	
Data: 	2015-08-01	
Ano: 	2015	
Palavras-chave: 	Precision agriculture; Electrical conductivity; Management zones.	
Resumo: 	Brazilian soils have natural high chemical variability; thus, apparent electrical conductivity (ECa) can assist interpretation of crop yield variations. We aimed to select soil chemical properties with the best linear and spatial correlations to explain ECa variation in the soil using a Profiler sensor (EMP-400). The study was carried out in Sidrolândia, MS, Brazil. We analyzed the following variables: electrical conductivity - EC (2, 7, and 15 kHz), organic matter, available K, base saturation, and cation exchange capacity (CEC). Soil ECa was measured with the aid of an all-terrain vehicle, which crossed the entire area in strips spaced at 0.45 m. Soil samples were collected at the 0-20 cm depth with a total of 36 samples within about 70 ha. Classical descriptive analysis was applied to each property via SAS software, and GS+ for spatial dependence analysis. The equipment was able to simultaneously detect ECa at the different frequencies. It was also possible to establish site-specific management zones through analysis of correlation with chemical properties. We observed that CEC was the property that had the best correlation with ECa at 15 kHz.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401112	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/01000683rbcs20140794	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.39 n.4 2015	
Fonte: 	info:eu-repo/semantics/openAccess