Chemical fertilizer If the seedbed soil with high fertility. Brave and good, it does not need fertilizer. Because beauty is too weak to pull the leaves are long, then the lack of a simple and slower when applied to black lace. But if the soil has low fertility. The fertilizer ammonium phosphate (16-20-0) at about 25-40 kg per hectare. By inserting after sowing the seeds for about 7 days or when the eggs were already flooded plots.