Agricultural robots are going to become even more sophisticated in the future. Farmers are already using them to pick apples and strawberries and even herd animals. The Di-Wheel is a concept robot with two powered wheel modules for agricultural use. It features adjustable track width.
Users can attach sensors to the center of the shaft to monitor plant health. The DiWheel is capable of towing payloads with its adjustable tow arm. The Australian Centre for Field Robotics has more on this robot.