Aerial view of wheat harvest with four combines in a role,Burlington, CO

crop harvesting tractor farming agricultural agriculturally agribusiness agricultural machinery agricultural equipment modern combine moving on the move usa us united states of america america united states north america colorado burlington field combines tractors dust smoke four trails lines nobody motion harvest agriculture cultivation wheat harvester vast nature growth crops farm farm machine production yield long husbandry outdoors day aerial view high angle view side profile profile side view vertical color colour color image photography