Surajo, A.; Fagam, A. S.; Ali, G.; Sabo, M. U.; Bindawa, M. A.; Yahaya, S. U. EFFECT OF DIFFERENT PHOSPHORUS FERTILIZATION AND SOWING DATES ON GROWTH AND YIELD OF LABLAB (Lablab Purpureus L. Walp) VARIETIES IN SEMI-ARID ECOLOGICAL ZONE OF RINGIM, JIGAWA STATE, NIGERIA. njaat 2023, 3, 142-149.