Earthworm, Annelid, Burrowing & Soil Fertility
Earthworms
How Do Earthworms Reproduce?
Earthworm - Wikipedia
Cover Crops Can Triple the Amount of Earthworms in Soil - Modern Farmer
The amorous earthworms
Gone With the Worm: Invasive Earthworms Irrevocably Alter Kenai
Common earthworm
Earthworms boost global crop production by 140 million tons
Answer to earthworm's ability to digest poisons unearthed by scientists, Biochemistry and molecular biology
UMaine scientists discover invasive earthworms in Aroostook forestland - UMaine News - University of Maine