Buckwheat is a very affordable crop with the all in cost averaging about $60 to $90 per acre for seed, planting, harvesting, fuel, repairs, and other inputs.
According to Cornell’s Fact Sheet 50, with favorable weather and good soil, buckwheat yields 20-30 bu/ac. (1000 -1500 lb). Buckwheat grown on poorer ground will have lower yields (10-12 bu/ac. is common). The state average is usually about 15 bu/ac.
Some causes of lower yields include muddy conditions at sowing or emergence (causes stunted plants), heat during flowering (causes poor set), delayed harvest (causes excessive shattering), and excessive vegetative growth (reduces seed set and complicates harvest).”