Organic Onion Cultivation

Dear friends,
I am new to agriculture and I am about to start onion cultivation in 3 acres(non-cultivated land for 3 years) and prefer to go organic/natural way.
Please guide me the step-by-step approach in achieving the positive results.
The details I would like to know are;

  • Seed source,- Seed treatment,
  • Soil treatment before sowing
  • Soil treatment after sowing
  • What, How & When: to use for plant nourishment, pest control for better yield.

Thanks in advance
Guru Prasad