Working Farms Agriculture is Montana’s leading industry with multi-billion dollar economic impact. Within that large industry, working farms are a significant percentage with over 28% of Ag-land use in cropland in dry-land or irrigated lands. Several varieties of wheat are by far the largest crop grown but others like canola, safflower, barley, oats, hay and lentils make up a percentage. By far the most stunning visually that will make non-farmers pull over with their cameras is the near neon yellow canola plant flower. New crops entering the market include hops and hemp. This selection of Montana farms helps keep America fed.