Nutrient deficiencies, pest pressure, and water stress are often invisible to the naked eye for weeks before they show up in yield, by the time a problem is visible from the ground, the economic damage is already done. True crop health monitoring requires actual multispectral imagery, not just high-resolution photographs, and the research behind it has matured into genuinely rigorous, peer-reviewed agricultural science. This guide covers what NDVI and multispectral crop monit
