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 2026, 3 (2), 1120-1128. https://doi.org/10.63841/iue3261120.