Using image analysis to estimate the soil organic carbon content

Soil test for organic carbon content using the Walkley-Black standard method is a laborious task that takes almost 5 working days to report the results. In order to improve lab analysis efficiency, a new analytical method using digital images is proposed. Using multivariate image analysis (MIA) soil...

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Bibliographic Details
Published in:Microchemical journal 2019-06, Vol.147, p.775-781
Main Authors: de Oliveira Morais, Pedro Augusto, de Souza, Diego Mendes, Madari, Beata Emoke, Soares, Anderson da Silva, de Oliveira, Anselmo Elcana
Format: Article
Language:English
Subjects:
Chemometrics
Green chemistry
LS-SVM
MIA
Soil test
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Summary:Soil test for organic carbon content using the Walkley-Black standard method is a laborious task that takes almost 5 working days to report the results. In order to improve lab analysis efficiency, a new analytical method using digital images is proposed. Using multivariate image analysis (MIA) soil organic carbon (SOC) contents can be determined in  0.93, between image data and SOC contents measured by the standard analytical method. The proposed MIA method is eco-friendly, cheap, fast, and a clean alternative that can be employed by soil testing laboratories for measuring SOC contents. •Soil organic carbon can be determined using digital images.•Correlation higher than 0.93 between predicted and standard contents•New analytical method is faster and cheaper than the standard method.•Analysis can be adopted by soil testing labs.•Methodology is environmentally friendly.
ISSN:0026-265X
1095-9149
DOI:10.1016/j.microc.2019.03.070