Rôle des vers de terre dans la formation de la terre végétale

Rôle des vers de terre dans la formation de la terre végétale

Rôle des vers de terre dans la formation de la terre végétale

Charles Darwin

10,91 €
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Editorial:
Prodinnova
Año de edición:
2020
Materia
Ecología, la biosfera
ISBN:
9783967874204
10,91 €
IVA incluido
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«... Les vers de terre sont extraordinairement nombreux dans les terrains humides et partout où abonde la végétation. N’est-il pas étonnant qu’on ait aussi rarement songé à se préoccuper de l’influence qu’ils peuvent avoir sur les qualités du sol ? Deux hommes, habitués l’un et l’autre à mesurer l’importance que peuvent prendre les petites causes, lorsque leur influence a une longue durée ou lorsque leur action se répète souvent, ont, dans ces dernières années, attiré l’attention sur les Lombrics, à des points de vue différents : M. Pasteur a montré qu’ils ramenaient incessamment à la surface les germes des maladies contagieuses contenus dans les cadavres enfouis des animaux morts de ces maladies ; Darwin a prouvé qu’ils prenaient une part considérable à la formation et à l’élaboration de la terre végétale, en même temps qu’ils contribuaient à changer l’aspect des contrées qu’ils habitent, en rendant meubles sur les pentes des montagnes des matériaux qui sont ensuite plus facilement entraînés dans les vallées et les cours d’eau par les eaux de pluie...»

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