Data/hora: 09/06/2024 11:48:42

Provedor de dados: | 70
País: | Brazil
Título: | Outlining precision boundaries among areas with different variability standards using magnetic susceptibility and geomorphic surfaces
Autores: | Matias,Sammy S. R.; Marques Júnior,José; Siqueira,Diego S.; Pereira,Gener T.
Data: | 2014-08-01
Ano: | 2014
Palavras-chave: | Detailed mapping; Pedometrics; Accuracy boundaries.
Resumo: | There is an increasing demand for detailed maps that represent in a simplified way the knowledge of the variability of a particular area or region maps. The objective was to outline precision boundaries among areas with different accuracy variability standards using magnetic susceptibility and geomorphic surfaces. The study was conducted in an area of 110 ha, which identified three compartment landscapes based on the geomorphic surfaces model. To determinate pH, organic matter, phosphorus, potassium and magnesium, the total sand and clay, 514 soil samples were collected at depths of 0-0.20 m and 0.60-0.80 m. The sum of base, cationic exchange capacity and base saturation were calculated and the magnetic susceptibility was evaluated in the laboratory using a system based on a balance of analytical precision method. Geomorphic surfaces identification allowed setting specific management areas (locations with maximum homogeneity of soil attributes). The map of spatial variability of magnetic susceptibility can be used to validate the precise boundaries among geomorphic surfaces identified in the field and infer the variability of clay content and soil base saturation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400009
Editor: | Associação Brasileira de Engenharia Agrícola
Relação: | 10.1590/S0100-69162014000400009
Formato: | text/html
Fonte: | Engenharia Agrícola  v.34 n.4 2014
Fonte: | info:eu-repo/semantics/openAccess