Healthy vs Sick vs Dead Leaf Spectral Reflectance Comparison #2173128 (License: Personal Use)

The image displays three side-by-side diagrams-one for a healthy leaf, one for a sick leaf, and one for a dead leaf-each showing relative reflectance in blue, green, red, and near-infrared (NIR) bands using colored arrows. Healthy leaves show high NIR reflectance and moderate green reflectance, while sick leaves exhibit reduced NIR and altered green/red ratios; dead leaves show elevated red and blue reflectance with sharply diminished NIR. Below each diagram is a representative leaf image: vibrant green for healthy, mottled green for sick, and yellow-brown for dead.

Used in agronomy, precision farming, and remote sensing education to explain vegetation indices like NDVI; supports user intent to understand how spectral data reveals plant stress or mortality.