Mental stress affects performance. With regard to farming, it has been more dangerous with greater fatality rates than any other occupation. The farmers often work on their own for long hours with untrustworthy equipment and in hard climates, with hazardous chemicals and livestock. In addition, they make large financial commitments that expose them to higher levels of financial risks giving them higher levels of mental stress. Thus, an attempt was made in this chapter to identify the key risk factors in farming workplaces in addition to the levels of depression, anxiety, and work stress of farmers of Indian agriculture leading to mental ill health among them, and further to develop a fuzzy-based model considering both these cases in the fuzzy-environment for the evaluation of mental-stress.