This has to be seen in conjunction with the slurry-spreading by "Monster Tanker" video. Reason? Same set of fields. The slurry, in other words, is being ploughed under. If it had been injected, it would have been ploughed back on top! DanYRheol kit, John Deere 7810 with 5-furrow reversible. The weight box on the front says "1500kg".
John, Deere, 7810, with, 5-furrow, reversible.