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Tank-mixing herbicides can increase the efficiency of weed control on soybean plant. The purpose of this study was to acquire the proper dose of pendimethalin and sulfentrazone both alone and in mixture to control weeds on soybean plant. It was conducted in July-September 2019 at Experimental Farm, Faculty Agriculture, Universitas Syiah Kuala, employing Randomized Block Design (RBD) non-Factorial comprising different doses of herbicides:  control, pendimethalin 1.5 kg a.i ha^-1, sulfentrazone 1.5 kg a.i ha^-1, pendimethalin 0.75 kg a.i ha^-1 + sulfentrazone 0.75 kg a.i ha^-1, pendimethalin 1 kg a.i ha^-1 + sulfentrazone 1 kg a.i ha^-1, pendimethalin 0.5 kg a.i ha^-1 + sulfentrazone 1 kg a.i ha^-1, pendimethalin 1 kg a.i ha^-1 + sulfentrazone 0.5 kg a.i ha^-1 and pendimethalin 0.5 kg a.i ha^-1 + sulfentrazone 0.5 kg a.i ha^-1. Variables observed were weed control percentage, weed species, number of weeds, and weed dry weight. The results showed that the application of pendimethalin 0.5 kg a.i ha^-1 together with sulfentrazone 0.5 kg a.i ha^-1 has increased weed control percentage and decrease weed species, weed individual and weed dry weight

efficacy; pre-emergence herbicide ; tank-mixing; weed control