06 Jan Agriculture & Climate Change: What Role Do Vegetation Indices Play?
कृषि एवं जलवायु परिवर्तन: वनस्पति सूचकांक क्या भूमिका निभाते हैं? Precision farming offers many valuable tools that help assess plant health yield potential and enable more efficient farm management. One such tool is vegetation indices (VIs). Choosing the proper vegetation index that suits your camera equipment, environmental conditions, crop type, and growth stage is crucial to obtaining precise results. Understanding common indices' main benefits and drawbacks is essential for selecting the best one for your business needs. Every object that we see is a reflection of light waves on the electromagnetic spectrum. While visible wavelengths appear in different colors to us, cameras or specialized sensors from satellites, drones, or ground-based devices can detect other wavelengths of light. Plant leaves need to absorb specific wavelengths of light to carry out photosynthesis. They can also reflect light depending on their physical condition and development. Leaf chlorophyll absorb most blue and red light and reflect higher levels of green light. That's why we see plants as green. The reflectivity of leaves increases sharply in the red or near-infrared spectrum. Water absorbs short infrared waves, which are poorly reflected. The crown of a tree and an individual leaf reflect light differently due to the volume and orientation of the leaves and the transmission of light to the plant's...