This document discusses John Deere tractors, listing the main types including four wheel drive, row crop, specialty, track, utility, compact utility, and sub-compact tractors. It notes that John Deere tractors are considered one of the best farm tractor brands in the world, having been founded in 1837, and provides details on four wheel drive tractor models, specifically the 9R/9RT series up to 560 hp. Contact information is given to obtain more details.