RESPONSE OF SOME COWPEA VARIETIES (Vigna unguiculata L.) YIELD TO VARIATIONS IN DAYLENGTH IN SUDAN SAVANNA OF NIGERIA. FJS [Internet]. 2023 Mar. 31 [cited 2025 Sep. 17];3(1):179-88. Available from: http://162.254.38.185/index.php/fjs/article/view/1441