Spectral Reflectance Associated with Anthropogenic Impact

The special attention paid to ecological problems associated with the anthropogenic impact on the environment, and first of all on vegetation, determines the importance of studies directed towards the development of efficient means for early phytodiagnostics. The identification of abnormal plant state caused by various stress factors such as soil toxic contamination is of particular interest. Remote sensing has proved abilities in this respect. The goal of the this paper is to illustrate the use of spectral reflectance data for crop monitoring when anthropogenic factors are applied, represented here by nitrogen fertilization and soil heavy metal pollution. The specific reflectance, absorption and emission of solar radiation by land covers are the basis of multispectral remote sensing. Widely used in soil and vegetation monitoring is the visible and near infrared spectral range due to some its advantages, such as: concentrates the largest portion of solar energy, covers the biologically active spectra, requires relatively simple technical devices, shows significant sensitivity to plant parameters variations.