The Chisel Plough is primary tillage deep plough, working up to 20" to ensure development of crop root system at proper depth and environment. It is an ideal implement where top soil is fertile but subsoil is not productive. The Chisel Plough increases natural fertility of soil as deep tillage provides enough circulation of air, moisture, and sunlight into soil. For full penetration in the first pass, a 50 to 85 hp tractor would be required. A medium (50hp) tractor will plough 12" in the first pass and full 20" depth will be attained in the second pass.