In a ripe, healthy crop of winter wheat, John Deere Limited unveiled the S700 series of combines for the 2018 season, an update from the S600 series launched in 2012. In a low-key but impressive demonstration, the 617hp 40kph rotary tracked machine purred up and down the field carrying its 35ft draper table with little effort from the 13.5-litre PowerTech engine. The tracked machine left a tidy but dense sward of straw for the following John Deere square baler. This is a machine with serious output that had the two waiting 20ft trailers full in no time. If anything, its 14,100-litre tank was a bottleneck on a machine with this kind of capacity.