Safety demos, help for farmers’ physical, mental health set for National Farm Machinery Show. The physical and mental health of farmers will take center stage for the Kentucky Department of Agriculture (KDA) at this year’s National Farm Machinery Show. Each year, the National Farm Machinery Show brings the newest selection of cutting-edge agricultural products, equipment, and services. This year, KDA will also give those in attendance the chance to get the latest advancements for their physical and mental health.