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1978年沈阳农业大学谭启栋教授提出了中心抽样调查方法,打破了纯随机抽样的框子,变无意识的随机抽样为有意识的遵照某种条件的随机抽样,无疑是森林调查史上的一次重大突破。经我们几年的试用表明,这种方法具有样本单元含量少,计算简便,精度较高等优点,同常规抽样比较可节省70％～80％的工作量,不但加快了调查速度,还减少了经费开支,适用范围较广,凡能满足概知条件的总体,均可采用中心抽样方法调查。
In 1978, Professor Tan Qidong from Shenyang Agricultural University proposed a central sample survey method, breaking the frame of pure random sampling. Random sampling of unconsciousness as a conscious random sample according to certain conditions is undoubtedly a major breakthrough in the history of forest surveys. After several years of our trial shows that this method has the advantages of small sample unit content, simple calculation, high accuracy, compared with conventional sampling can save 70% to 80% of the workload, not only speed up the investigation speed, but also reduce the funding Expenses, the scope of application is broader, who can meet the general conditions of the general can use the center sampling survey.