Akpan M, Afu S, Olim D. SPATIAL VARIABILITY OF SOIL pH AND CEC USING PREDICTIVE MODELS IN THE MOUNTAINOUS REGION OF OBANLIKU, CROSS RIVER STATE, NIGERIA. JAFE [Internet]. 2026 Jun. 4 [cited 2026 Jun. 9];10(1):77-96. Available from: https://jafe.net.ng/index.php/home/article/view/304