The plus trees selection of Q. variabilis should use the small sampleplotmethod and the standard is different in each region.
栓皮栎优树选择应采用小样地法,各地区选择标准不同。
2
By the statistical analysis method, the authors researched the growth model and cutting age of masson pine natural forest with the sampleplot inventory data.
根据标准地调查资料,应用统计分析方法研究生长模型,并结合森林经营实际确定采伐年龄。
3
The method of the standard sample-plot combined with remote sensing and GIS are employed.