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根据在黑龙江省３１个县、市进行的多年谷子农业生态联合试验，并运用双重组合试验设计原理进行模型挂接，建立了黑龙江省谷子区域性农业生产数学模型。初步揭示了积温降水，土壤肥力及农家肥、化肥对谷子产量的影响程度及相互间的变化规律，并应用模型对谷子产量形成过程进行了模拟和预测。
According to the multi-year experiment on millet agro-ecology carried out in 31 counties and cities in Heilongjiang Province, and using the principle of double combination experimental design to model the model, a mathematical model of regional agro-production in Heilongjiang Province was established. The effects of accumulated temperature and precipitation, soil fertility and farmyard manure and chemical fertilizers on the yield of millet were revealed. The model was used to simulate and predict the yield formation of millet.