Khedri, E. , , Oustan, S. , and Reyhanitabar, A. . "Hysteresis Indices of Potassium Sorption-Desorption Isotherms in Some Soils of East Azarbaijan Province, Iran", Iranian Journal of Soil Research, 30, 4, 2017, 427-442. doi: 10.22092/ijsr.2017.109261