The spectral signature of a plant’s leaf refers to the characteristic pattern of reflectance and absorption of electromagnetic radiation across different wavelengths, which is widely used in geoinformatics for vegetation mapping, crop assessment, and ecosystem monitoring. This spectral behavior is controlled by a combination of internal leaf properties, external environmental conditions, and regional factors, causing noticeable variations in different regions of the world. One of the primary factors controlling the spectral signature of a leaf is its biochemical composition. Chlorophyll pigments strongly absorb radiation in the blue and red regions of the visible spectrum while reflecting green wavelengths, which gives leaves their green appearance. Variations in chlorophyll concentration due to nutrient availability, plant species, growth stage, or stress conditions alter reflectance patterns, especially in the visible region. In regions with fertile soils and favorable climatic conditions, higher chlorophyll content generally leads to lower red