STUDY ON THE CHARACTERISTICS OF VEGETATIVE ORGANS OF STENOTAPHRUM SECUNDATUM(WALT.) KUNTZE AND AXONOPUS COMPRESSUS(SWARTZ)BEAUV. A Study on Photosynthetic Physiological Characters of Vegetative and Reproductive Tillers of Axonopus Compressus Effect of periodic defoliation on clonal growth in Axonopus compressus