the economic study of farmers, behavior on animal manure use at farm level of esfarayen

abstract unbalance using of chemical fertilizers cause decline the soil quality and fertility, environmental pollution and specially soil and water resources pollution. the use of animal manure is a replacement to chemical fertilizers. therefore, recognizing of demographic, technical-extensional and agronomic affect on farmer's decision making process to use of animal manure will have important role in policy making and planning system in this field. this paper used tobit model and a cross sectional data of 80 farmer of north khorasan province in 2009 to study of farmers, behavior to use animal manure. result showed that distance between ranching and farm and leguminous cultivation have negative effect and existence of educated person in family, farmers, education and knowledge of long run risks of chemical fertilizers have positive effect on use of animal manure. with regard to results, transferring of subsidies from chemical to organic fertilizers, education and information transferring about long run risks of chemical fertilizers to farmers and targeting of educated persons of families in extensional train related to animal manure to conduct of farmers to sustainable agriculture and conservation of environment suggested.