The yields of many important crops in Europe have been stagnating since the 1990s. As a result, the input of organic matter into the soil -- the crucial source for humus formation -- is decreasing.

1. The evolution of ideas on raw humus formation is briefly reviewed. 2. It is shown experimentally that mixtures of the litters of Spruce and Hazel, Spruce and Hornbeam, and Spruce and Epilobium ...

Résultat du processus d'humification qui décompose la matière organique fraîche (débris végétaux et animaux) en matière organique stabilisée, l'humus représente la couche la plus superficielle du sol.

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