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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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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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Bahasa Inggeris ● Format PDF ● ISBN 9780259615903 ● Penerbit Forgotten Books ● Diterbitkan 2017 ● Muat turun 3 kali ● Mata wang EUR ● ID 7316791 ● Salin perlindungan Adobe DRM

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