Ploughing heavy land after sugar beet in arduous conditions with an impressive 1985 Caterpillar D6D SA VHP (Variable Horsepower) crawler and Dowdeswell DP1HD 7f on-land plough. A set of custom-made extended grouser plates have been fitted which cut through the slippery top layer very effectively, and the setup is doing a good job, ploughing without smearing or compaction.
From the Project 20 Part 3 DVD which can be ordered here http://www.anglianagrimedia.co.uk/p20.html