bigtractorpower — In this video Big Tractor Power spends time in a 2,800 acre wheat field with 6 JOHN DEERE X9 1100 combines rated at 690 hp equipped with 50ft JOHN DEERE HD50F draper heads. Four 440 hp John Deere 9R 440 Tractors and KINZE 1321 Grain Carts and fifteen semi trucks keep the harvest moving.