STUDIES ON THE FEASIBILITY OF GROWING JAPANESE MINT (Mentha arvensis L. var. piperascens) IN KERALA AND ITS RESPOSE TO NITROGENOUS, PHOSPHATIC AND POTASSIC FERTILISERS - V RAMACHANDRAN NAIR; C K N NAIR (AGRICULTURAL COLLEGE AND RESEARCH INSTITUTE VELLAYANI DIVISION OF AGRONOMY, 1964)