DETERMINATION OF VEGETATION STAGE, SOIL QUALITY AND TYPE BY OPTICAL SPECTRUM MEASUREMENTS

Veaceslav SPRINCEAN, Mihail CARAMAN, Arcadii CHIRIȚA, Florentin PALADI Universitatea de Stat din Moldova

Abstract

Diffuse reflection and photoluminescence spectra are investigated for soil and leaf samples collected at different stages of development. The vegetation stage of the leaves and their type can be determined both by the edge of the diffuse reflection band in the range 460÷520 nm, and by the numerical value of the diffuse reflection coefficient in the slope region of the dependence Rd(λ). The spectral interval is determined, in which the quality and type of soil can be established according to the size of the diffuse reflection coefficient. Keywords: diffuse reflection spectra, photoluminescence spectra, vegetation stage, soil quality and type.