| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
|
| País: |
Brazil
|
| Título: |
Mapping Soil Cation Exchange Capacity in a Semiarid Region through Predictive Models and Covariates from Remote Sensing Data
|
| Autores: |
Chagas,César da Silva
Carvalho Júnior,Waldir de
Pinheiro,Helena Saraiva Koenow
Xavier,Pedro Armentano Mudado
Bhering,Silvio Barge
Pereira,Nilson Rendeiro
Calderano Filho,Braz
|
| Data: |
2018-01-01
|
| Ano: |
2018
|
| Palavras-chave: |
Data mining
Geostatistics
Landsat 5
Legacy data
Soil survey
|
| Resumo: |
ABSTRACT: Planning sustainable use of land resources requires reliable information about spatial distribution of soil physical and chemical properties related to environmental processes and ecosystemic functions. In this context, cation exchange capacity (CEC) is a fundamental soil quality indicator; however, it takes money and time to obtain this data. Although many studies have been conducted to spatially quantify soil properties on various scales and in different environments, not much is known about interactions between soil properties and environmental covariates in the Brazilian semiarid region. The goal of this study was to evaluate the efficiency of random forest and cokriging models applied to predict CEC in the Brazilian semiarid region. The covariates used to predict CEC consist of images from Landsat 5 TM and a legacy soil map (scale 1:10,000). The sample set comprises 499 samples from the topsoil layer (0.00-0.20 m), where 375 samples were used in training processes and 124 as validation samples. The cokriging model (R2 = 0.57 and RMSE = 7.22 cmolc kg-1) performed better in predicting CEC than the random forest model (R2 = 0.47 and RMSE = 7.89 cmolc kg-1). The approach used showed potential for estimating CEC content in the Brazilian semiarid region by using covariates obtained from orbital remote sensing and the legacy soil map.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100311
|
| Editor: |
Sociedade Brasileira de Ciência do Solo
|
| Relação: |
10.1590/18069657rbcs20170183
|
| Formato: |
text/html
|
| Fonte: |
Revista Brasileira de Ciência do Solo v.42 2018
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
