Preliminary Analysis Of Spectral Signatures Over Soil Surface Agricultural Attributes
Keywords:
Field radiometry, crop residues, soil surface conditions, soil managementAbstract
Such is the importance to estimate and monitor the spatial and time variability from the superficial features of agricultural soil that it contributes to carry out research on essential processes of the agro-ecosystems. Although spectral methods based on satellite data have been of great help, still they are not as accurate as they should at field level. Field radiometry helps to increase the accuracy of spectral response on agricultural grounds under different management systems. The aim of this work is to make a qualitative analysis on spectral signatures regarding different features, and considering current interactions on agricultural grounds under field conditions as well. Field-measured Spectroradiometric reflectances have been obtained (“ASDFieldSpec Pro FR”) over 8 transects in agricultural plots with no crops, under different soybean residue covers, and under different soil management systems. These acquisitions took place on soils with similar characteristics as regards granulometric and water content. Even though preliminary results have been obtained up to now, they show that the superficial features taken into account (interactions among different crop residue covers, different amounts of crop residue cover / soil moisture, and changes in structure) do have an effect on the spectral response of the soils in question.
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References
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