Hassan محمد علي, Hamed علي السيد, and Ibrahim كاملة عبدالرشيد. 2016. “Effect of Plant Density and Intercropping Patterns on Growth and Productivity of Maize and Cow Pea”. University of Aden Journal of Natural and Applied Sciences 20 (1):9-22. https://doi.org/10.47372/uajnas.2016.n1.a02.