Hilal, Nashmi Ahmed, Ahmed Ibrahim Khalaf, and Afrah Abdul Kareem Hussein Alwan. “Role of Phosphorus Source and Biochar Levels on Some Fertility and Productivity Characteristics of Barley Crop Grow in Gypsiferous Soils”. American Journal of Botany and Bioengineering 3, no. 2 (February 6, 2026): 34–44. Accessed June 6, 2026. https://www.biojournals.us/index.php/AJBB/article/view/2028.