MODELLING SOIL HUMUS CONTENT - AN ESSENTIAL CONDITION FOR PROTECTION, FERTILITY AND SUSTAINABILITY

Abstract

This paper presents the results of a multi-annual experimental and analytical study devoted to the long-term evolution of humus and organic  carbon content under the differentiated conditions of mineral and organo-mineral fertilisation technologies, with complex influences on the dynamics of soil organic components, implicitly on soil protection and conservation, and on certain environmental indicators. The results of this study reside in the analysis that was scientifically and practically carried out primarily by defining and determining the parameters for expressing and even forecasting changes in the agrochemical components of the soil, and then by using the data obtained in the recommended measures and productively utilising them to improve soil quality and health. The parameters resulting from the modeling form the basis and restoration measures of the humic yield. Two case studies are presented in which the humic component of the soil is a key and effective element in an approach to a sustainable fertilisation system and in the efficiency of methods for the ecological reconstruction of soils historically polluted with heavy metals.