An attempt was made to systemize the data and to develop a methodology for a reliable evaluation of the nitrogen emissions and other ecological pollutants from pig manure wastes in the Republic of Bulgaria. The authors find the suggested methodology to be precise enough and easy to be managed as it combines the use of the available official statistical sources and the possibility of its integration into comparatively popular software products (EXCEL). The methodology could be taught in practical seminars for students and specialists in the area of agroecology.
