“Effect of Adding NPKZn Fertilizer in Growth and Yield of (Vigna raditia L.)” (2017) Ibn AL-Haitham Journal For Pure and Applied Sciences, 28(3), pp. 302–308. Available at: https://jih.uobaghdad.edu.iq/index.php/j/article/view/161 (Accessed: 7 May 2024).