It's not specifically what you're talking about, but individual plant management is becoming more and more popular. It's done with drones - not the blade type b

It's not specifically what you're talking about, but individual plant management is becoming more and more popular. It's done with drones - not the blade type but the wing type. They use multispectral cameras and interpretation that ends up showing you things like malnutrition, over/under watering, crop wear, disease, insect infestations etc. There has been a similar thing for decades, from planes. But drones mean much more regular intervals and much higher resolutions.