Drones in agriculture assist with everything from surveying the lay of the land to spreading of seed to the application of pesticides and fertilizers. Recent advances in technology allow drones to map topology, moisture retaining areas of a field and can even detect current crop health. The biggest advantage is helping to take the guesswork out of agricultural equations.
Consider the possibility of precisely targeting, from the air, a section of a field that may need a little more fertilizer of a bit more attention to weed control. All of this without the addition of costly manual labor!