Using soil knowledge for the evaluation of mid‐infrared diffuse reflectance spectroscopy for predicting soil physical and mechanical properties

Abstract

Mid-infrared diffuse reflectance spectroscopy can provide rapid, cheap and relatively accurate predictions for a number of soil properties. Most studies have found that it is possible to estimate chemical properties that are related to surface and solid material composition. This paper focuses on prediction of physical and mechanical properties, with emphasis on the elucidation of possible mechanisms of prediction. Soil physical properties that are based on pore-space relationships such as bulk density, water retention and hydraulic conductivity cannot be predicted well using MIR spectroscopy. Hydraulic conductivity was measured using a tension-disc permeameter, excluding the macropore effect, but MIR spectroscopy did not give a good prediction. Properties based on the soil solid composition and surfaces such as clay content and shrink-swell potential can be predicted reasonably well. Macro-aggregate stability in water can be predicted reasonably as it has a strong correlation with carbon content in the soil. We found that most of the physical and mechanical properties can be related back to the fundamental soil properties such as clay content, carbon content, cation exchange capacity and bulk density. These connections have been explored previously in pedotransfer functions studies. The concept of a spectral soil inference system is reiterated: linking the spectra to basic soil properties and connecting basic soil properties to other functional soil properties via pedotransfer functions.

Espectroscopia de infravermelho na determinação da textura do solo

“…Ela também permite o estudo simultâneo de espécies orgânicas e inorgânicas (Reig et al, 2002), sendo bem atrativa para o monitoramento ambiental, modelagem e agricultura de precisão (Viscarra-Rossel et al, 2006). Muitos estudos têm demonstrado que a espectroscopia de refletância difusa no infravermelho fornece sinais marcantes, que podem ser usados para predizer muitos atributos físicos, químicos e biológicos do solo (Madari et al, 2006;Viscarra-Rossel et al, 2006;Minasny et al, 2008). Entre os atributos físicos já estudados estão a superfície específica e as frações de areia, silte e argila, sendo a maioria dos trabalhos realizada no sentido de determinar a granulometria do solo (Malley et al, 2004;Reeves III, 2010).…”

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

“…KBr-pellet), DRIFT or ATR, depends on parameters such as the sample size, the information needed (bulk versus surface analysis) or the time required for the sample preparation. Currently, the improved design of DRIFT accessories has made this technique widely used for studying soil compounds (Aguiar, et al, 2013;Calderon, et al, 2011aCalderon, et al, , 2011bDemyan, et al, 2012;Ellerbrock, et al, 2009;Francioso, et al, 2009;Leue, et al, 2010;Ludwig, et al, 2008;Minasny, et al, 2008); ATR is also now being widely used (Artz, et al, 2008;Gezic, et al, 2012;Neves-Fernandes, et al, 2010;Vergnoux, et al, 2011).…”

“…This technique was introduced by Nguyen, et al (1991) for studying soil chemical composition and was subsequently used to investigate SOM and the chemical composition of humic substances, as well as the effect of amendment practice on soil (Aguiar, et al, 2013;Calderon, et al, 2011aCalderon, et al, , 2011bDemyan, et al, 2012;Ellerbrock, et al, 2009;Ferrari, et al, 2011;Janik, et al, 2007a;Kaiser, et al, 2007;Leue, et al, 2010;Ludwig, et al, 2008;Minasny, et al, 2008;Reeves III and Smith, 2009). It has also been applied to study many other agricultural related aspects such as the composition of different coal ranks (Chen, et al, 2012;Li, et al, 2010) and their soluble SOM fraction (Gezic, et al, 2012;Ghosh, et al, 2009), the chemistry of waste and compost materials (Huber-Humer, et al, 2011;Salati, et al, 2013;Smidt and Meissl, 2007), the decomposition processes of forest litter (Duboc, et al, 2012;Nault, et al, 2009;Osono, et al, 2011;Tatzber, et al, 2010), the chemical structure of pyrogenic organic matter (OM) Nocentini, et al, 2010) and the behaviour of chemical compounds adsorbed on clays (Aochi and Farmer, 2011;Dorado, et al, 2010).…”

“…MIR spectroscopy has frequently been applied to investigate soil properties and soil organic matter (SOM) characteristics (Aguiar, et al, 2013;Bellon-Maurel and McBratney, 2011;Calderon, et al, 2011aCalderon, et al, , 2011bDemyan, et al, 2012;Du and Zhou, 2009;Francioso, et al, 2009;Haberhauer and Gerzabek, 1999;Kaiser, et al, 2011). Currently, the combination of multivariate statistical methods used for the Fourier Transform IR (FTIR) spectra analysis has provided a powerful method for the discrimination and identification and/or quantification of single components in soils (Aguiar, et al, 2013;Bellon-Maurel and McBratney, 2011;Bornemann, et al, 2010;Calderon, et al, 2011aCalderon, et al, , 2011bD'Acqui, et al, 2010;Fernandez-Getino, et al, 2013;Janik, et al, 2007aJanik, et al, , 2007bLudwig, et al, 2008;Minasny, et al, 2008;Pirie, et al, 2005;Reeves III, 2010;Stumpe, et al, 2011;Tatzber, et al, 2010;Viscarra Rossel, et al, 2006;Yang, et al, 2012). The representation of MIR spectra is not uniform in the literature.…”

Yakın kızılötesi yansıma spektroskopisi (NIRS) ile bazı toprak özelliklerinin belirlenmesi

“…Yapılan Toprakta şişme büzülme potansiyelini ortaya koyan COLE değeri, minimum 0.003 ve maksimum 0.174 olarak bulunmuştur. Minasy et al (2008), ortalama % 34 kil içeriğine sahip toplam 777 adet toprak örneğinde COLE değerini % 53'lük bir tahmin başarısı ile elde ettiğini belirtmiştir. Yapılan çalışmada ise Minasy et al (2008)'e paralellik göstererek R 2 =0.50 olarak belirlenmiştir (Şekil 16).…”