Weeds are the main problem in soybean production due to their harmful effects and its need to control properly in the right time for effective control and maintain yield.  The main objective of this study was to investigate the effect of weeding time on density of weeds and yield of soybean under no tillage system.  Five weeding times (2, 4, 6, 8, 10 weeks after sowing) and two soybean cultivars (Sindoro and Slamet) were tested in a randomized complete block design with three replicates.  The highest summed dominance ratio (SDR) of weeds was Cynodon dacylon and Cyperus rotundus than other weeds at different time of weeding.  Weeding at two weeks after sowing under no tillage gave the higher soybean yield than other weeding time.

Soybean, weeding time, no tillage, SDR, yield

Presentation: oral