Dégradation anthropique d'un sol - Ukraine
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Photo Ruellan-0045 Ukraine Climat continental La matière organisue et la belle structure grumeleuse de l'horizon supérieur de ce sol ont été détruites, en quelques années, par une agriculture mécanisée menée dans des conditions inadaptées (outils trop lourds, sols trop humides...). Il y a eu ainsi genèse de l'horizon gris supérieur, à structure massive. Voir le livre "Regards sur le sol" p.49, 97, 145.
Date de cette photo: 26 août 1964
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