High dependence of agricultural production on nature and market factors cause activities in this field be so risky. In this paper we try to recognize effective factors on risk for pistachio farmers in sirjan. Needed data were collected by interviewing with 186 farmers in 2012. For statistical analysis, we used tobit discrete regression. Results show that risk frequency of previous year, diversity of cultivated crops, off farm employment; crop acreage was affecting risk positively. Also age, participating in a crop supervisory, ownership of machinery, Insured crop acreage had negative effect on production risk. Finally, some recommendations are made to reduce factors affecting risk.
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