The Mulberry Dike Fish Ponds in Digang village, China, is a 2500-year-old circular agricultural model. Mulberry leaves on the embankments feed the silkworms, whose excrete and sloughs serve as food for the fish in the pond whilst the fish excrete fertilises the pond mud [600×1231]

The Mulberry Dike Fish Ponds in Digang village, China, is a 2500-year-old circular agricultural model. Mulberry leaves on the embankments feed the silkworms, whose excrete and sloughs serve as food for the fish in the pond whilst the fish excrete fertilises the pond mud [600×1231]

by Fuckoff555