Manure is a valuable resource that can be used as an alternative fertilizer to inorganic fertilizers,but it has a high potential
for pollution if not disposed and treated properlywell.Manure pProcessing,which transforms manure into biological organic
fertilizer from manure,is the an important approach achieving theavoiding pollutants pollutionto be recycled and promoting agricultural and
environmental sustainability.Evaluation of manure resource is the key point for implementation of biological organic fertilizer project because,because the transporting distanceation range offor manure is limited around the point where the intensive livestock manure is producedtion.Meanwhile,sitting of biological organic fertilizer plant is also influenced by environmental,social,economic and institutional factors.This paper study described a method for identifying the distribution of pig manure resources and evaluated optimal sitting for biological organic fertilizer plant based on GIS and the principle of break-even hauling distance method(BEHD) in Xinluo County,Fujian Province.According to local situation,village was selected as evaluating unit.The potential collectable manure mapping was produced based on spatial analysis function of GIS.The constraints of economyic(proximity to road networks),institution(proximity to residential area and natural protection zone),and environment(proximity to watercourses) et al.were selected as the factors to evaluateing the siting of biological fertilizer plants based on the potential collectable manure distribution mapping.The results showed that there iswas plenty ofiful manure for implementing the biological organic fertilizer project in research site.The manure resource was is distributed mainly in outskirts of city and itwhich was is also a potential pollutant to the environment if manure was not used properly.The priority areas for biological organic fertilizer project have been identified after integrating environmental,economic,and biophysical factors based on the resource mapping.Finally,three scenarios were are determined as the optimal sites for biological organic fertilizer plants.The break-even hauling distanceBEHD was is a very important factor in manure resource mapping,as well as which could be proved by scientific study before used in siting the biological fertilizer plants in different areas in the previous study.The evaluation results of evaluation couldcan be the scientific support and theoretic basis for decision makers inin working outplanning livestock production plan and fertilizer producers inin deciding potential area for plants.To the environmental protection department,Mmanure resource mapping could can also be a valuable tool for environmental protection department to highlight the priority areas where there will be a potential pollution problem.the potential for pollution could be a problem.