Quantification et caracterisation de la matiere organique de sols alluviaux au cours de l'evolution de la vegetation

Abstract

One series is situated on mainly calcareous alluvia and the other on alluvia principally constituted of orthogneiss. The amount (stock in carbon and nitrogen) of organic matter is a better indicator than its quality, which virtually does not change in a calcareous environment and only slowly in acid conditions. As compared with the vegetation dynamic, the slow humus evolution in these soils seems to reveal in less than 100 yrs a shift in the soil-vegetation relationship. -from English summary