If you've seen the movie Looper, you'll remember the scene above, showing what appears to be a drone crop sprayer. I think agricultural uses of UAVs will be one of the most interesting commercial markets, so this post lists a few suggested starting places and resources for people who want to follow this sector.
- New DIY Drones Agricultural UAVs user group
- Google+ Agricultural UAV community
- Report on potential size of agricultural UAV market (chart below)