How are you?. interesting question, Although I don't know exactly what means "soil spectral features" for you, If carbonate content is free in the mas of soil and it bring about impacts on crop growth, therefore it would be expected that, because of that effect, it would observed some changes in the soil light spectrum profile (e.g. more or less reflectance). Another aspects of the carbonate content on the spectral feature would be its effect on soil color and hence, in the light emission behavior...if you provide more details maybe we can give some guidance.
Excellent observation Dalibor!. noncalcareous vertisols is an quite interesting exception to my theory!. This shows the complexity of the soil-plant relationship and the importance of the evaluation of the methodology for the specific site specific conditions. As stressed by Dalibor, the reflectance approach assessment may be useful as a tool but in other cases it will be not able to "read" the variations in crop growth, when there are soil properties that impact on such growth but they haven't any influence on the soil reflectance....
Hello All,
First I'd have to ask what kind on Spectra are you talking about ? From my experience in Fourier transform Infrared Spectrometry (FTIR), calcium carbonate banda appear around 2508 cm-1 and there are other smaller bands associated with this molecule. And its a quick way to help characterize a given soil
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