What Is NDVI and Why Should You Care

NDVI stands for Normalized Difference Vegetation Index. It is a measurement that uses near-infrared and visible light reflected by plants to assess crop health. Healthy vegetation absorbs most visible light and reflects a large portion of near-infrared light. Stressed or sparse vegetation does the opposite.

When a multispectral drone like the DJI Mavic 3M flies your fields, it captures both visible and near-infrared imagery simultaneously. Software then processes those bands into an NDVI map where every pixel gets a value between negative one and positive one. Higher values mean denser, healthier vegetation. Lower values indicate bare soil, stressed crops, or weed-dominated zones.

Reading Your NDVI Map

Most NDVI maps use a color gradient. Dark green areas indicate the healthiest, most vigorous crop canopy. Light green to yellow zones suggest moderate stress or thinner stands. Red and brown areas flag serious problems — bare ground, heavy weed patches, nutrient deficiency, or disease pressure.

The key is not just seeing the colors but knowing what to do with them. A red zone in your wheat field might mean waterhemp has taken over that corner. A yellow band running through soybeans could indicate a compaction line from last season. NDVI tells you where to look — ground-truthing and AI analysis tell you why.