Spectral Analysis: A Modern Approach to Soil Quality Assessment
Riaj Rahaman
Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi (110 012), India
Sunanda Biswas*
Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi (110 012), India
DOI: NIL
Keywords: Soil analysis, Soil quality, Spectroscopy, Remote sensing
Abstract
Quality assessment of soil has become an important activity in the view of protecting and preserving soil as well as sustaining its function. Soil spectroscopy has proven to be a rapid, cost-effective and environmentally friendly method of soil assessment, effectively addressing many of the limitations of conventional methods. The spectral soil analysis includes preparing soil samples, acquiring spectral data, pre-processing of data and selecting a suitable statistical model for the desired output. Different soil attributes exhibit sensitive bands in the spectral reflectance curve. By leveraging the changes in reflectance values at distinct wavebands, soil attributes can be accurately evaluated. The interference of chromophores with physical properties of soil, overlapping of absorption features sometimes restricts the use of spectroscopy. Incorporating supplementary variables into the modelling process can alleviate this constraint and improve the effectiveness of spectroscopic analysis.
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Reference
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