You could help real-world farmers by playing Cropland Capture

Dave Tach, Polygon:

Cropland Capture, a game hosted on the Geo-Wiki Project’s website, tasks players with identifying cropland from Google Earth images. Players get points for identifying land and could win an Amazon Kindle, a Samsung Galaxy S4 and more through the game’s ongoing tournament. According to a recent tweet from the game’s official Twitter account, players have combed more than 300,000 square kilometers of land.

Crowd-source gaming initiative to find better cropland.