Buckwheat yields

With favorable weather and good soil, buckwheat yields 20 to 30 bushels per acre (1000 to 1500 lb). Buckwheat grown on poorer ground will have lower yields, with 10 to 12 bu/ac common in those conditions. The state average is usually about 15 bu/ac.

Some causes of lower yields are muddy conditions at sowing or emergence causing a stunted plants; heat during flowering causing poor set; delayed harvest causing excessive shattering; or excessive vegetative growth reducing seed set and complicating harvest. See What buckwheat doesn't like