The role of earthworms in sustainable agriculture

By Jaswinder Singh

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Greek philosopher Aristotle described earthworms as the ‘intestines of the earth’. (Photo credit: USDA, Flickr)

Sustainable agriculture means the production of food from plants or animals using different agricultural techniques that protect communities, the environment, and animal welfare. The extensive use of chemical pesticides and fertilizers to boost crop yields may have resulted in good yields and productivity, but it has caused the efficiency of the soil to deteriorate throughout the world day-by-day. This modern agricultural practice has caused a steep fall in the biodiversity (above and below the ground) associated with cropland ecosystems.

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Earthworm-farmer friendship, redefined

Earthworms suppress fungal diseases in the soil © pfly (Flickr, CC BY-SA 2.0 license)

Earthworms are known as farmers’ best friends because of the multitude of services they provide that improve soil health and consequently plant health. The density of earthworms in the soil is considered to be a good indicator of a healthy soil because they improve many soil attributes like structure, water holding capacity, moisture content etc., and also increase nutrient availability and degrade pesticide residues. As scientists understand these ‘ecosystem services’ provided by earthworms, they discover that this earthworm-farmer friendship is a lot deeper than previously imagined! Continue reading