They have doohickey's out now that take advantage of satellite imaging to tell the farmers where there is a problem in the fields, where it may need more or less fertilizer or water, how to plant better, when crops need to be rotated. There is also equipment with camera's on them that adjust the fertilizer or pesticides coming out of each nozzle on the fly. That way what is being put on the crop is customized for what that section of field needs.
As been said above, combines and tractors where the operator just monitors what is going on, because between the GPS and the onboard computers everything is taken care of.
If you want to improve farming, figure out how to drive a machine thru a field picking ripe tomatoes without bruising it, or knocking any other tomatoes to the ground. Or how to harvest fruit, only the ripe fruit, out of a tree or off a vine. Or how to pick broccoli, cabbage, lettuce and other foods like that without all the stoop labor.