| Description |
The objective for this session is of interest to scientists working with VIS, NIR, and MID-IR diffuse reflectance spectroscopy. The conveners' goal is to provide an opportunity to share experiences, establish current knowledge, describe the many applications, present recent advances, and discuss future possibilities for research and adoption of the techniques described below. The use of visible (vis), near-infrared (NIR) and mid-infrared (mid-IR) diffuse reflectance spectroscopy (DRS) in soil science and land resource assessment has attracted much attention over the last ten years. This is reflected by the large numbers of papers on both vis-NIR and mid-IR in the scientific literature over this period. Soil vis-NIR and mid-IR techniques are integrative in that they contain information on both organic and inorganic soil composition, which make them particularly useful for determining various physical, chemical and biological soil properties. Advances in chemometrics and computing power have allowed scientists to extract such information from the spectra by the modeling of complex relationships that exist in these data. DRS has some important advantages over conventional soil analysis. For example, the techniques are non-destructive, they are highly reproducible, they are rapid, cost effective, easy to operate, a single spectrum can produce information on various soil properties, small quantities of sample are needed for analysis, they require minimal sample preparations, and they do not require the use of environmentally harmful chemicals. Hence, the techniques can be also used to provide quantitative information for input into environmental and soil process models and digital soil mapping. The soil color is another important attribute to characterize soils. Accurate measurements color parameters can be obtained from transformation of soil reflectance spectra in the visible spectral region. And the primary goal of this session about the soil color is to provide an update on our state of knowledge concerning the origin and measurement of soil color.
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