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Charles Darwin
Formation of Vegetable Mould [PDF ebook]
Through the Action of Worms, With Observations on Their Habits

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Copertina di Charles Darwin: Formation of Vegetable Mould (PDF)

The share which worms have taken in the formation of the layer of vegetable mould, which covers the whole surface of the land in every moderately humid country, is the subject of the present volume. This mould is generally of a blackish colour and a few inches in thickness. In different districts it differs but little in appearance, although it may rest on various subsoils.

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Lingua Inglese ● Formato PDF ● ISBN 9780259615903 ● Casa editrice Forgotten Books ● Pubblicato 2017 ● Scaricabile 3 volte ● Moneta EUR ● ID 7316791 ● Protezione dalla copia Adobe DRM

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