并利用逐步回归分析方法，建立大豆产量的预测模型，找出影响大豆产量的主要气象因子。
Taking advantage of stepwise regression, we find the main meteorological factors which affect the soybean output and establishes a calculate model.
土壤水分与肥料是影响作物产量与品质的重要因子。
The soil humidity and fertilizer dosages are important factors that affect the farm crop yield and qualities.
分析了三角帆蚌对水体的主要水质因子变化及鱼产量的影响。
The main water factors of fishpond water in lakeshore and the impact of fish yield were analyzed.
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