The seed required for raise seedling for planting of one hectare crop of cabbage

Cabbage (Brassica oleracea var capitata) is a small, leafy biennial producing a compact globular mass of smooth or crincled leaves wrapped over each other known as head. The outer leaves are generally larger than the inner. The stem is short and stout. Plants flower generally after winter.
The seed required to raise seedling for planting of one hectare crop of cabbage is 400 - 500 gm.
Prior to sowing seeds are treated with fungal culture of Trichoderma viride (4 g/kg of seed) or Thiram (3 g/kg of seed) to avoid damage from damping-off disease.