linkedin post 2016-07-03 06:50:04
SOIL ENGINEERING. "Darwin concluded that the ingestion of the topsoil, and its mixing, grinding, and digestion in the gut, continually exposed rock particles to chemical alteration, increasing the amount of soil. This process, and the addition of faecal casts from the worms, builds up the humus-rich topsoil and buries various materials originally on the surface (e.g., seeds, pebbles, archaeological artifacts) down to depths of 2 m, depending upon the depth of the earthworm burrows." https://lnkd.in/e8jbAfG View in LinkedIn