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为了客观判断作物新技术（品种）的增产作用，针对对照可比性，样本代表性，技术措施间的互作效应等易失误的几个问题进行了探讨，以求减少失误
In order to objectively judge the increasing effect of new crop varieties (varieties), several problems such as comparability of control samples, representativeness of samples and interaction effects between technical measures were discussed in order to reduce errors