Tara Abubakr Mohammed and Namam Bahram Ismael 2022. The Effect of Different Nitrogen Concentration and Cutting Frequency on Some Quality Characters of Two Sorghum (Sorghum bicolor L. Moench) Varieties. Zanco Journal of Pure and Applied Sciences. 34, 5 (Oct. 2022), 92–102. DOI:https://doi.org/10.21271/ZJPAS.34.5.8.