The middle duty series disc harrow opens and breaks up the soil surface to help prepare the soil seedbed for planting. The forward gang has aggressive notched discs while the rear gang has a choice of notched or smooth discs to quickly break up and evenly redistribute the finely cultivated topsoil. Also different types are available to satisfy the requirement of 30-100hp tractors. They have applications in homeowner landscaping, small nurseries, gardens, small hobby farms, wild game food plots, and medium-duty residential use.