The efficiency of 7 treatment methods for breaking dormancy in zoysiagrass (Zoysia japonica Steud.) seeds was synchronously compared. Two methods in which seeds soaking in 30% NaOH solution for 20 or 80 minutes were the optimum for breaking dormancy of seeds due to their simple and easy operation in techniques, economic and rapid effectiveness in performance and high germination rates (77.6% and 88.0% respectively).
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