robberds wrote:Does anyone know the conversion factor for bushells/acre (dry) (USA) to tonnes/hectare for grain production?
Some of our traditional terms are more complicated to convert from one system to another. Grain yields for example are conventionally expressed in terms of volume per acre (bu/a). In the metric system, yield is given by weight (kilograms per hectare).
A yield of 200 bushels per acre is first expressed by weight (200 bu @ 56 lb/bu = 11,200 lbs) and then converted to kilograms (11,200 lbs ? .45 kg/lb = 5,040 kg). Since a hectare is equal to about 2.5 acres, it means that 200 bu/ac is equal to about 12,600 kg/ha (5040 kg/ac x 2.5 ac/ha = 12,600 kg/ha). This translates into 126 quintals per hectare and 12.6 metric tons per hectare.
Corn (56# bu)
1 kilogram/hectare (kg/ha) = .0159 (.016) bushels/acre
1 bushel/acre = 62.77 (63) kilograms/hectare
1 quintal/hectare (q/ha) = 1.593 (1.6) bushels/acre
1 bushel/acre = .6277 (.63) quintals/hectare
1 metric ton/hectare (MT/ha) = 15.93 (16) bushels/acre
1 bushel/acre = .0628 (.06) metric tons/hectare
Wheat/soybeans (60# bu)
1 kilogram/hectare (kg/ha) = .0149 (.015) bushels/acre
1 bushel/acre = 67.25 (67) kilograms/hectare
1 quintal/hectare = 1.487 (1.5) bushels/acre
1 bushel/acre = .6725 (.67) quintals/hectare
1 metric ton/hectare = 14.87 (15) bushels/acre
1 bushel/acre = .0673 (.07) metric tons/hectare
