Open Google earth and zoom into Punjab. It is the greenest agriculture zone in the entire world. Just look at it yourself.
Now I don't know the specifics, but it is a starting point. If we are able to get the knowledge from the locals there on their ancient farming techniques, that knowledge will be net positive for the world.
And one more thing. The GMO crops being introduced I that region needs to STOP. It will kill the best farming land we have and then there will be no ability to rewind time.
Read about the recent farmers protests there to also know more about the problems the farmers are facing.