Droughts result in crop failures and the loss of pasture grazing land for livestock. Livestock manure helps maintain the fertility of grazing lands. The arid regions generally support only livestock grazing, chiefly beef cattle. Ragwort is abundant in waste land, waysides and grazing pastures. The rents were raised and tenants evicted to create large cattle grazing pastures. This act paved the way for clearance of enormous areas of forest for cattle grazing. Large bonfires were lit serving as protection for grazing cattle. Most of the rest is grassland, rough grazing, or woodland. The ranches were devoted to sheep grazing. Grasses are uncommon, making most of the biome unsuitable for grazing. The tribes followed the seasonal grazing and migration of the bison. The tribes followed the bison's seasonal grazing and migration. Hay is generally one of the safest feeds to provide to domesticated grazing herbivores. Both of these requiring new grazing and herd-management strategies. The tribe leases some of its communal land for homes, farms, grazing, and commercial uses.