What yield does buckwheat (kuttu) give and is it worth growing on hill land?

Buckwheat is a low input crop suited to marginal hill land where little else grows well, but yields are modest, commonly in the range of about 3 to 6 quintal per acre. Its value is that it is short duration, tolerates poor soil, fills a gap in the cropping calendar, and has a guaranteed if seasonal fasting market. It is not a high income crop, so judge it as a useful crop for marginal land and the festival market rather than a money spinner. The honest position is that you grow kuttu because the land and season suit it and there is a known demand, not because the price is high. Pair it with milling or FPO selling if you want better returns, and confirm the recommended variety and practice with your KVK.