Olojugba, Michael, and Ibiloye, John Olufemi. “Inter & Active Effect of Tillage and Nitrogen Fertilizer on Maize (Zea Mays L.) Performance on a Humid Alfisol Southwestern, Nigeria”. Asian Journal of Soil Science and Plant Nutrition 4, no. 3 (March 30, 2019): 1-11. Accessed April 13, 2021. https://journalajsspn.com/index.php/AJSSPN/article/view/30044.