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观察了大豆10个没种处理结英株数的差异，将其作为协变量对各处理籽粒干重的数据进行了分析，首创用字母加名次的双重标记法表述多重比较结果，以便更精确地反映统计控制的效果。就不同的试验指标阐明了实施统计控制必须具备的先决条件，
The difference of the number of engulfing plants in 10 species of soybean was observed and used as a covariate to analyze the data of the dry weight of each grain. The method of double labeling with letters and additions was first proposed to express multiple comparisons so as to reflect more accurately The effect of statistical control. The different test indicators clarify the prerequisites for the implementation of statistical control,