Kumar, Ashmitha, Wekha Wafula, and Nicholas Korir. “Effect of Biofertilizer on Growth and Yield Characteristics of Zea Mays L. In Different Ecological Zones in Kenya”. Asian Journal of Soil Science and Plant Nutrition 4, no. 3 (May 4, 2019): 1-7. Accessed June 26, 2019. http://journalajsspn.com/index.php/AJSSPN/article/view/30045.