人工造林面积、森林覆盖率和林业用地面积平稳上升，但四旁植树株数下降幅度较大。
The area of artificial forestation, forest cover rate and forestry land were increasing steadily, but trees along the road and field were reducing greatly.
以典型三阶抽样和一阶抽样方法，建立调查样本，对中山市乡镇和自然村四旁绿化进行抽样调查。
Survey samples are set up by using typical methods of 3-rank and 1-rank sampling to survey the turning the "four sides" green of townships and villages in Zhongshan City.
以典型三阶抽样和一阶抽样方法，建立调查样本，对中山市乡镇和自然村四旁绿化进行抽样调查。
Survey samples are set up by using typical methods of 3-rank and 1-rank sampling to survey the turning the "four sides" green of townships and villages in Zhongshan City.
应用推荐