试验于1985—1986年在广东西江林业局下属林场及林科所苗圃进行。通过两年来的探索，初步弄清了本地区苗圃地的杂草种类和密度；
This research was carried out at the tree nurseries of both in the Forest farm and the Research Institute of Forestry subordinate to the Xi—jiang Forestry Bu'reau, Guangdong province, from 1985—1986.
试验于1985—1986年在广东西江林业局下属林场及林科所苗圃进行。通过两年来的探索，初步弄清了本地区苗圃地的杂草种类和密度；
This research was carried out at the tree nurseries of both in the Forest farm and the Research Institute of Forestry subordinate to the Xi—jiang Forestry Bu'reau, Guangdong province, from 1985—1986.
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