Deep ploughing in Biddinghuizen, The Netherlands, with a modified Fendt 936 Vario and Fendt 714 Vario from contractor Van Werven. Behind the Fendt 936 is a Panter deep plough, that can work at a maxium depth of around 1 metre. The soil is ploughed so deep to remove compacted layers. These have formed after fourty years of farming and disrupt root and plant growth. Because this clay soil is relatively heavy, peat is brought to the surface so the level or organic matter rises.