Usman, A., Sotannde, O. A. and Alkali, I. B. (2021) “Leaf Macronutrient Resorption During Senescence in Three Non-Indigenous Tree Species in Sudano-Sahelian Region of Nigeria”, Journal of Agricultural Economics, Environment and Social Sciences, 7(2), pp. 174-185. Available at: http://jaeess.com.ng/index.php/jaeess/article/view/120 (Accessed: 30June2022).