Data/hora: 01/06/2024 08:11:12

Provedor de dados: 	124	
País: 	Brazil	
Título: 	Apparent soil electrical conductivity in two different soil types	
Autores: 	Medeiros,Wilker Nunes; Valente,Domingos Sárvio Magalhães; Queiroz,Daniel Marçal de; Pinto,Francisco de Assis de Carvalho; Assis,Igor Rodrigues de.	
Data: 	2018-03-01	
Ano: 	2018	
Palavras-chave: 	Precision agriculture; Management zones; Soil sampling.	
Resumo: 	ABSTRACT  Mapping the apparent soil electrical conductivity (ECa) has become important for the characterization of the soil variability in precision agriculture systems. Could the ECa be used to locate the soil sampling points for mapping the chemical and physical soil attributes? The objective of this work was to examine the relations between ECa and soil attributes in two fields presenting different soil textures. In each field, 50 sampling points were chosen using a path that presented a high variability of ECa obtained from a preliminary ECa map. At each sampling point, the ECa was measured in soil depths of 0-20, 0-40 and 0-60 cm. In addition, at each point, soil samples were collected for the determination of physical and chemical attributes in the laboratory. The ECa data obtained for different soil depths was very similar. A large number of significant correlations between ECa and the soil attributes were found. In the sandy clay loam texture field there was no correlation between ECa and organic matter or between ECa and soil clay and sand content. However, a significant positive correlation was shown for the remaining phosphorus. In the sandy loam texture field the ECa had a significant positive correlation with clay content and a significant negative correlation with sand content. The results suggest that the mapping of apparent soil electrical conductivity does not replace traditional soil sampling, however, it can be used as information to delimit regions in a field that have similar soil attributes.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100043	
Editor: 	Universidade Federal do Ceará	
Relação: 	10.5935/1806-6690.20180005	
Formato: 	text/html	
Fonte: 	Revista Ciência Agronômica  v.49 n.1 2018	
Fonte: 	info:eu-repo/semantics/openAccess