Spectroscopy studies the interaction between electromagnetic radiation and matter. The method of evaluating the spectral characteristics of different biotic or abiotic materials and surfaces originates in the laboratory spectroscopy, where it was used in physical and analytical chemistry hence atoms and molecules have unique spectra. Today the technological development has made possible to carry out high spectral resolution in-field analysis and airborne hyperspectral imaging. This technology also creates new perspective for information management in site specific agricultural production. In this study we are introducing the technological basis of reflectance spectroscopy and hyperspectral imaging with some experimental results in modern agriculture