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1·The test had studied the proper time and method of controlling dayflower.

本试验讨论了鸭跖草防除的时期和方法。

2·The effects of different soil water content, depth of sowing and dose of fomesafen on dayflower emergence were studied.

通过提供不同外界环境条件的方法，研究了土壤含水量、播种深度及除草剂虎威对鸭跖草出苗的影响。