“Mineralogical Characterization of Potassium-Bearing Clay Minerals and Their Implications on K Availability in Calcareous Soils of Sulaymaniyah, Kurdistan: Mineralogical Characterization of Potassium-Bearing Clay Minerals and Their Implications on K Availability in Calcareous Soils”, Acad. J. Int. Univ. Erbil, vol. 3, no. 2, pp. 1120–1128, Apr. 2026, doi: 10.63841/iue3261120.