Season and Field preparation
Red loam to black soils with good drainage facilities is highly preferred for bellary onion cultivation. The pH of 5.8 - 6.5 with mild season is preferred.
May – June is best season for planting.
10 kg/ha seeds are required for a hectare.
Treat the seeds with Azospirillum @ 400 g/kg of seed using rice gruel as adhesive, dry under shade for 30 minutes and sow them.
Apply VAM 1 kg/sq. m in the beds along with FYM 10 kg/sq.m before sowing.
Preparation of main field
Plough the land to get a fine tilth and incorporate 25 t/ha of FYM at the time of last ploughing. Form ridges and furrows at 45 cm spacing.
Plant 45 days old seedlings at a spacing of 10 cm apart on both the sides of the ridges.
After establishment irrigate at weekly intervals.
Application of fertilizers
Apply FYM 25 t/ha, Azospirillum 2 kg and Phosphobacteria 2 kg/ha, N 50 kg, P 150 kg and K 75 kg/ha as basal dose and N 50 kg/ha as top-dressing is done at 30 days after planting. Apply Zinc sulphate as basal dose @ 50 kg/ha at the time of last ploughing.
Big onion and aggregatum onion production through fertigation
Quality seedling production
Seed treatment and seed rate
8-12kg of onion seeds are required to raise seedlings for one hectare of land. The seeds are treated with Pseudomonas fluorescens @ 10g/ kg of seeds.
Harvesting and post harvest management
Effect of Endo root soluble and Mycorrhizae on Onion