The green revolution of India was primarily because of newer strain of crops and mechanisation to some degree. Chemical industry simply was not mature enough in 50s to have been a major factor.
I can corroborate this. My family was involved in a chemical manufacturing business in India from the 60s onwards. My understanding from what my family tells me is that the 80s and early 90s is when a lot of these base manufacturing inputs became readily available.
interesting (!) good to put details on the general trends. crop type, latitude and elevation, proximity to rail and other industrial infrastructure, market economics with demographics.. more? all would inform this crucial and interdependent topic
