ASSESSING THE FITNESS AND VALIDITY FOR DEPTH-DISTRIBUTION PATTERNS OF AVAILABLE MICRONUTRIENTS (Fe and Mn) OVER A TOPOSEQUENCE AT LAFIA NORTH-CENTRAL NIGERIA: APPLICATION OF EQUAL-AREA SPLINES. (2020). FUDMA JOURNAL OF SCIENCES, 4(1), 43-54. http://162.254.38.185/index.php/fjs/article/view/17