During Friday 13/05/2005 morning, Jean Luc Farinet, CIRAD expert in agricultural waste processing, has introduced the environmental situation in France and its specific regulation that 'favour' an exportation of animal waste on crops; a general overview about basic chemical and physical informations aimed to better understand; in addition, M. Farinet has described existing treatment technology in Europe when Nitrogen surpluses are locally observed. Based on these considerations, 'intense' discussions with technical officers and policy makers have been initiated about situation and constraints in Thai Binh.