Why did the Green Revolution in India virtually by-pass the eastern region despite fertile soil and good availability of water?

The Green Revolution of the mid-1960s was a package technology — HYV seeds, assured irrigation, fertilizers, credit and price support — that succeeded only where the entire package could be delivered. Eastern India lacked the package, not the natural endowment.

Why the east was bypassed

• Water control, not availability, was the constraint: flood-prone rivers such as the Kosi, Gandak and Brahmaputra, chronic waterlogging and a negligible canal-tubewell base denied the assured, controlled irrigation that HYVs demand.
• Agrarian structure worked against adoption: tiny fragmented holdings and insecure sharecropping under the zamindari legacy left cultivators with neither surplus nor incentive to invest in costly inputs.
• Infrastructure gaps — weak rural electrification for pumpsets, poor roads, thin fertilizer distribution and limited institutional credit and extension reach.
• Procurement and marketing support (MSP operations, regulated mandis) were concentrated in the north-west, so eastern farmers faced price risk on any surplus.
• Policy design itself: the strategy deliberately concentrated scarce inputs on already-irrigated Punjab, Haryana and western Uttar Pradesh — “betting on the strong” — and the early dwarf wheat varieties suited north-western rabi conditions best.

Recognizing the unfinished task, the Bringing Green Revolution to Eastern India (BGREI) programme was launched in 2010–11, and the east — with its fertile alluvium and abundant groundwater — is now projected as the frontier of India’s second Green Revolution.