Charles Darwin: Formation of Vegetable Mould (PDF) < جيو ساينس < علوم < آخر الأخبار

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

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غلاف 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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لغة الإنجليزية ● شكل PDF ● ISBN 9780259615903 ● الناشر Forgotten Books ● نشرت 2017 ● للتحميل 3 مرات ● دقة EUR ● هوية شخصية 7316791 ● حماية النسخ Adobe DRM

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