Initial production goals in 1980 were 19 tonnes/hectare of maize and 6.7 tonnes of soybean (Flannery, 1982).
Initial production goals in 1980 were 19 tonnes/hectare of maize and 6.7 tonnes of soybean (Flannery, 1982).
研究过程中，他产出两种作物北美迄今为止的最高产量，每公顷玉米21.2吨，大豆7.95吨。