“DARWIN’S estimate that more than 50,000 worms could inhabit an acre of soil was in fact quite low; scientists have shown the figure to be one million. Earthworms in the Nile River valley can deposit up to 1,000 tons of castings per acre, which helps to explain the astonishing fertility of Egypt’s agricultural land. As Darwin had only begun to suspect, earthworms pass the top few inches of soil through their guts every year.”
http://archive.wilsonquarterly.com/essays/darwins-worms
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022