What farming techniques did the Aztec use?

The Aztecs had a unusual farming technique. The Aztecs lived in the middle of a lake. So, to solve their farming problem, they wove baskets, put dirt and a crop seed, and finally placed it on the lake. When it's time to harvest the crop, they just pull it toward the land and collect the crop. Too bad that technique isn't used today. :( That would be totally wicked!! :)