* “Our” current worms appeared there is 200 million years (and we, only 200 000 years ago)
* Earthworms are classified into three main categories:
1) leaf litter- or compost-dwelling worms that are nonburrowing, live at soil-litter interface and are called Epigeic,
2) topsoil- or subsoil-dwelling words that feed (on soit), burrow and cast within soil, creating horizontal burrows in upper 10–30 cm of soil (called Endogeics),
3) worms that construct permanent deep vertical burrows which they use to visit the surface to obtain plant material for food, such as leaves (called Anecic (meaning “reaching up”)).
* An essential link of the food chain and the guarantors of the fertility of grounds.
* Clean up grounds, handle waste water, recycle the organic waste by digesting them; thanks to the composting, our trash cans decrease in 40 %!
* Fight against the erosion and restore life in our dry lands: they are the “first ploughmen of the ground”, they return huge surfaces and bring to the ground this lump and aire structure, which disappears if earthworms are eliminated by chemical processings, fréquent plowings, or if the ground is compacted by the repeated passage of heavy machines.
- 1950: 2 tons of earthworms in the 1 ha of farmland in France / Today: Only 50kg to 200kg of earthworms are remaining in 1 ha of farmland… Let’s save earthworms!!!