Drones detect crop stress at UVA's farm

Drones are giving farmers a bird’s-eye view of their crops — and a way to grow food more precisely. This month, researchers and students from the University of Virginia, NASA and the University at Buffalo took to the skies above UVA’s 2,900-acre research farm to test drones equipped with heat and light sensors. Flying more than 100 feet above the fields, the team measured plant health at the Morven Sustainability Lab, aiming to show how aerial technology can make farming smarter.

The project comes as climate change and rising food demand push farmers to cut waste and boost yields without expanding land use. Traditional methods like ground scouting and satellite imagery can miss subtle changes in crop health. Drones fill that gap by capturing real-time data on temperature, light absorption and stress levels across large areas. Researchers say this kind of high-resolution monitoring could help farmers detect disease, drought or nutrient shortages days or weeks before symptoms appear on the ground.

During the tests, the drones flew programmed routes over corn, soybeans and other test plots at the Morven farm. Early results show the sensors can spot variations in plant color and temperature that indicate stress or disease. One NASA scientist involved called the flights a “proof of concept” for using low-altitude drones as a bridge between ground checks and high-altitude satellites. The team also included graduate students, giving them hands-on experience in agricultural technology and remote sensing.

If the method proves reliable, it could become a standard tool for precision agriculture — helping farmers use less water, fertilizer and pesticide while maintaining high yields. The partners plan to refine the sensors and expand testing next season. For a world facing food security challenges, this kind of innovation could help farming keep pace with demand — one flight at a time.