QUANTITY OF ABSCISIC ACID AND BREAK DORMANCY IN ZOYSIAGRASS SEED Seed dormancy characteristics for Vitex trzfolia var. simplicifolia Seed dormancy characteristics for Vitex trifolia var. simplicifolia Glume Microstructure of Zoysia japonica Seeds(Caryopsis)Before and After Breaking Dormancy Studies on the Method of Breaking Dormancy in Zoysiagrass Seeds STUDIES ON TURNOVER OF LEAF TISSUE IN MIXED SWARDS OF PERENNIAL RYEGRASS/WHITE CLOVER UNDER DIFFERENT GRAZING SYSTEMS