The use of manure has been a traditional management in agriculture, in the way to optimise and improve the efficiency of agricultural soils already degraded and overfarmed. This paper tries to establish the utility and feasibility of this technique in the improvement of soil stability. Aggregate stability of two soils, one on clays and the other over gypsum, and its response to erosion processes has been studied with several essays. Soils are on one hand, natural soils and, on the other, soil with manure in a proportional charge of 21 m3/Ha. Results show that, in terms of initial soil organic matter content, this traditional practice could give place to serious damages as a consequence of diminishing aggregate stability and increasing its erodibility.
