Kōrero: Earthworms

Earthworm casts

Earthworm casts

Earthworms excrete material known as casts. These may be laid in the soil, where they add to soil mixing, or at the soil surface. Surface casts are usually deposited by earthworms that form vertical burrows. The casts are very fertile, containing digested soil and plant material, and microbial agents that continue to transform nutrients. They are usually high in phosphorus, nitrogen and potassium.

Using this item

Te Ara - The Encyclopedia of New Zealand
Photograph by Emily Tutaki

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Me pēnei te tohu i te whārangi:

Gregor Yeates, 'Earthworms - Earthworms and soils', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/15503/earthworm-casts (accessed 20 May 2019)

Story by Gregor Yeates, published 24 Nov 2008