Balali, M. R., & Malakouti, M.J. (1998). Study of exchangeable K changes in agricultural soils of Iran. Soil Water, 12(3), 59–70 [in Persian].
Barros, M., Arroyo, P., Sousa-Aguiar, E., & Tavares, C. (2004). Thermodynamics of the Exchange Processes between K+, Ca2+ and Cr3+ in Zeolite NaA. Adsorption, 10(3), 227-235.
Chapman, H. D. (1965). Cation exchange capacity. In Black, C. A. (Ed), Methods of soil analysis. Part 2. (pp. 891–901). Madison (WI): American Society of Agronomy.
Filcheva, E. G., & Tsadilas, C.D. (2002). Influence of clinoptilolite and compost on soil properties. Communications of Soil Science and Plant Analysis, 33(3&4), 595–607.
Hagin, J., & Feigenbaum, S. (1962). Estimation of available potassium reserves in soils. Berne (Switzerland): Potassium Symposium, International Potash Institute. pp. 219–227.
Helmke, P. A., & D. L. Sparks. (1996). Methods of soil analysis, Part III: Chemical methods. Madison, Wisconsin, USA: American Society of Agronomy.
Jackson, M. L. (1975). Soil chemical analysis: advanced course. Madison, Wisconsin, USA: University of Wisconsin, College of Agriculture, Department of Soil Science.
Jalali, M. (2005). Release kinetics of nonexchangeable potassium in calcareous soils. Communication in Soil Science and Plant Analysis, 36(13-14), 1903-1917.
Jalali, M. (2006). Kinetics of non-exchangeable potassium release and availability in some calcareous soils of western Iran. Geoderma, 135(0), 63-71.
Kittrick, J. A., & E. W. Hope. (1963). A procedure for the particle size separation of soils for X-ray diffraction analysis. Soil Science, 96, 312-325.
Lopez-Pineiro, A., & Navarro, A.G. (1997). Potassium release kinetics and availability in unfertilized Vertisols of southwestern Spain. Soil Science, 162(12), 912-918.
McLean, E. O., & Watson, M.E. (1985). Soil measurements of plant-available potassium. In Munson, R. D. (Ed), Potassium in agriculture (pp. 227–308). Madison (WI): Soil Science Society of America.
Najafi-Ghiri, M. (2014). Effects of zeolite and vermicompost applications on potassium release from calcareous soils. Soil & water Research, 9, 31-37.
Najafi-Ghiri, M, & Abtahi, A. (2012). Factors affecting potassium fixation in calcareous soils of southern Iran. Archives of Agronomy and Soil Science, 58(3), 335-352.
Najafi-Ghiri, M, & Abtahi, A. (2013). Potassium fixation in soil size fractions of arid soils. Soil and Water Research, 8(2), 49-55.
Najafi-Ghiri, M., & Jaberi, H. R. (2013). Effect of soil minerals on potassium release from soil fractions by different extractants. Arid Land Research and Management, 27(2), 111-127.
Najafi-Ghiri, M., Abtahi, A., & Jaberian, F. (2011a). Factors affecting potassium release in calcareous soils of southern Iran. Soil Research, 49(6), 529-537.
Najafi-Ghiri, M., Abtahi, A., Karimian, N., Owliaie, H., & Khormali, F. (2011b). Kinetics of non-exchangeable potassium release as a function of clay mineralogy and soil taxonomy in calcareous soils of southern Iran. Archives of Agronomy and Soil Science, 57(4), 343-363.
Najafi-Ghiri, M., Abtahi, A., Owliaie, H., Hashemi, S. S., & Koohkan, H. (2011c). Factors affecting potassium pools distribution in calcareous soils of southern Iran. Arid Land Research and Management, 25(4), 313-327.
Nelson, D. W., & Sommers, L. E. (1982). Total carbon, organic carbon, and organic matter. In Page, A. L. (Ed), Methods of soil analysis, Part 2 (pp. 539–579). Madison (WI): American Society of Agronomy..
Nye, P. H., & Tinker, P. B. (1977). Solute movement in the soil-root system (Vol. 4). USA: University of California Press.
Olk, D., Cassman, K., & Carlson, R. (1995). Kinetics of potassium fixation in vermiculitic soils under different moisture regimes. Soil Science Society of American Journal, 59(2), 423-429.
Panuccio, M. R., Crea, F., Sorgona, A., Caccoa, G. )2008(. Adsorption of nutrients and cadmium by different minerals: Experimental studies and modeling. Journal of Environmental Management 88, 890–898.
Rezaei, M., & Movahedi Naeini, S. (2009). Kinetics of potassium desorption from the loess soil, soil mixed with zeolite and the clinoptilolite zeolite as influenced by calcium and ammonium. Journal of Applied Science, 9(18), 3335-3342.
Rich, C. I. (1968). Mineralogy of soil potassium. In Kilmer, V. J., Younts, S. E., Brady, N. C. (Eds). The role of potassium in agriculture (pp. 79–91). Madison (WI): American Society of Agronomy.
Rowell, D. L. (1994). Soil science: Methods and applications. Harlow. Essex (UK): Longman Scientific and Technical.
Salinity Laboratory Staff. (1954). Diagnosis and improvement of saline and alkali soils. Handbook No. 60. Washington (DC), United States. Department of Agriculture (USDA), Soil Survey Staff. 1994. Keys to soil taxonomy. Soil Conservation Service.
Soil Survey Staff. 2014. Keys to soil taxonomy. 12th ed. Washington, DC.: USDA-Natural Resources Conservation Service (NRCS).
Sparks, D. L. (1987). Potassium dynamics in soils. Advances in soil science, 6, 1-63.
Srinivasarao, C., Rupa, T., Subba Rao, A., Ramesh, G., & Bansal, S. (2006). Release kinetics of nonexchangeable potassium by different extractants from soils of varying mineralogy and depth. Communication in Soil Science and Plant Analysis, 37(3-4), 473-491.
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