TY - BOOK AU - MOHANAKRISHNAN S AU - Dr. C SREEDHARAN TI - UTILIZATION OF AZOLLA IN RICE ECOSYSTEM DIRECT AND RESIDUAL EFFECTS OF AZOLLA DUAL CULTURE U1 - J N83 MO 67 PY - 1983/// CY - COLLEGE OF AGRICULTURE VELLAYANI PB - DEPARTMENT OF AGRONOMY ER -