1. Akrawi, H. (2018). Effect of organic and inorganic fertilizer on availability of potassium in soil and yield of chickpea (Cicer arietinum L.). Iraqi Journal of Agricultural Sciences, 49(2), 295–301.
2. Auge, K. D., Assefa, T. M., Woldeyohannes, W. H., & Asfaw, B. T. (2017). Potassium forms of soils under enset farming systems and their relationships with some soil selected physico-chemical properties in Sidama zone, Southern Ethiopia. African Journal of Agricultural Research, 12(52), 3585–3594.
3. Azadi, A., Baghernejad, M., & Abtahi, A. (2015). Kinetics of potassium desorption from some calcareous soil (Fars Province, Southern Iran). International Journal of Forest, Soil and Erosion (IJFSE), 5(2), 46–51.
4. Azadi, A., Baghernejad, M., Karimian, N., & Abtahi, S. A. (2016). Sequential extraction of non-exchangeable potassium and its relationship with soil properties, mineralogy and soil taxonomy in some calcareous soils of fars province. Iranian Journal of Soil Research, 30(2), 187–199.
5. Baliuk, S. A., Solovey, V. B., Zakharova, M. A., Kucher, A. V., & Truskavetskyi, S. R. (2015). Analysis of information support for the condition of soil resources in Ukraine. Agricultural Science and Practice, 2, 77–84.