When considering the preparation of advisory programs, the mental attitude of the farmer or the manager of the farm has to be taken into account in order to adapt to the different management style. The Institut de l’Elevage (extension organization dealing with livestock) has been study the attitude phenomena and can out with 3 different profiles when it comes to manure as a whole, its role in the nutrient cycling and its relationship to water pollution. The “technical” farmers consider themselves as being modern and rational mostly consider manure as a waste; as for the “independent” farmers and the “affective” farmers, they consider manure positively but are generally not open minded toward change. This diversity has to be taken into account as well as the constraints associated with different farming systems and practices in order to prepare an effective advisory program. For the first group of farmers (“technical”), attention has to be focused on the nutrient cycling process and the mineralization evolution in the soil; for the second group (“independent”) the processes are have to be well presented and concrete results have also to be showed (demonstrations, testimoniesa