analysis of the farmers economic behavior to reduce the environmental effects of agricultural chemical inputs (a case study of kashaf- rood basin in mashhad)

the purpose of this study is the analysis of the farmers economic behavior to reduce the adverse environmental effects of agricultural chemical inputs by using contingent valuation approach and tobit model by heckman's two stage. to achieve the desired goal, 100 questionnaires collected by a random sampling from farmers of kashaf- rood basin in mashhad city in 2013. results showed that variables of age, education, type of agricultural activity, index 2 (farmers agree with the adverse effects of overuse of chemical fertilizers and pesticides, index 5 (farmers agree with investments to protect the soil and water), sex, number of households employed in agriculture, experience in the use of soil and water conservation practices, total area under cultivation and index 4 (farmers agree with well being of available soil and water) have a significant impact on the farmers financial participation to reduce the adverse environmental effects of chemical fertilizers. also, variables of age, education, total amount annual consumption of chemical pesticides per year, sex, main job, number of households employed in agriculture, type of agricultural activity, net savings of agriculture, land ownership status, total amount annual consumption of fertilizer per year, index 1 (farmers agree with benefits of preventing soil washing), index 4 (farmers agree with well being of available soil and water) and index 5 (farmers agree with investments to protect the soil and water) have a significant impact on the farmers financial participation to reduce the adverse environmental effects of chemical pesticides. according to the study results, suggestions is presented for reducing the adverse environmental impacts of chemical inputs.