Organic in my place(South of India) means no chemical and only used cattle dung/ food waster / or plant itself as manure/Fertilizer. No other chemical used but

Organic in my place(South of India) means no chemical and only used cattle dung/ food waster / or plant itself as manure/Fertilizer. No other chemical used but in my experience we made only 10 bags of paddy per acre while if we use Urea / Potasium + pesticides we managed up to 30 to 35 bags of paddy. I am not sure why in use organic farm still uses any chemical. There are good techniques to deal with pest though not very effective.