Use desi cow urine/dung based fertilizers & pesticides.
We have seen our ancestors doing this from centuries.
Desi Cow urine is like a amurta for us. It can be replaced fertilizers and pesticide. And nothing will be harmed.
They will also eat the leftover farming green waste you won't be needed to burn em. (Like sugar cane)
I have seen many gaushala makes 100% natural desi cow urin base product and it works charm in farm field.
It makes soil better, plant growth increases.