I remember riding this when I was 10. It was the first time that plants seemed remotely interesting to me.
In this part of the Living with the Land attraction at Epcot we see a range of crops planted closely together. They are actually being grown in a sterilized sand bed and being feed hydroponically.
As a young boy, I imagined myself in a giant space station where we used these techniques to produce our food and clean our air and water.