Alabama, US
The Old Rotation is a soil fertility experiment on the Auburn University campus in Auburn, Alabama. It started in 1896, and is the third-oldest ongoing field crop experiment in the United States and the oldest continuous cotton experiment in the world. It was the first experiment to show that a cott
on/legume crop rotation would allow soil to support a cotton crop indefinitely. The Old Rotation is listed on the National Register of Historic Places.
Listen to the audio guide for Old Rotation Free on WIP — starts by itself when you arrive, even with the screen off