1.Abdolzadeha, E.K.A., Sadeghipoura, H.R. and Aminei, A. 2011. The potential of glauconitic sandstone as a potassium fertilizer for olive-plants. Journal of Agronomy and Soil Science, 58(9): 983-993.

2.Amorosi, A., Sammartino, I. and Tateo, F. 2007. Evolution patterns of glaucony maturity: A mineralogical and geochemical approach. Deep Sea Research Part II: Topical Studies in Oceanography, 54(11-13): 1364-1374.

3.Barre, P., Velde, B., Fontaine, C., Catel, N. and Abbadie, L. 2008. Which 2:1 clay minerals are involved in the soil potassium reservoir? Insights from potassium addition or removal experiments on three temperate grassland soil clay assemblages. Geoderma, 146: 216–223.

4.Coroneos, C., Hinsinger, P. and Gilkes, R.J. 1996. Granite powder as a source of potassium for plants: a glasshouse bioassay comparing two pasture species. Fertilizer Research, 45(2): 143-152.

5.El-Habaak, G., Askalany, M., Faraghaly, M. and Abdel- Hakeem, M. 2016. The economic potential of El-Gedida glauconite deposits, El-Bahariya Oasis, Western Desert, Egypt. Journal of African Earth Sciences, 120: 186-197.

6.Fixen, P.E. and Johnston, A.M. 2011. World fertilser nutrient reserves: a view to the future. Journal of Science of Food and Agriculture, 92: 1001-1005.

7.Giresse, P. and Jamet, R. 1982. Cassava fertilizer trials with glauconitic sediments from the Congo. Pedologie, 19: 283–292.

8.Heffer, P. and Prud, M. 2014. Fertilizer Outlook 2014-2018. International Fertiliser Industry Association, pp. 26-28.

9.Levchenko, E., Ptyk-Kara, N. and Levchenko, M. 2008. Glauconite deposits of Russia: Perspectives of development. In: Abstracts. International Geological Congress, Oslo, pp. 6-14.

10.Rao, C.S. and Rao, A.S. 1999. Characterization of indigenous glauconitic sandstone for its potassium supplying potential by chemical, biological, and electroultraltration methods. Communications in Soil Science and Plant Analysis, 30(7-8): 1105-1117.

11.Rudmin, M. et al. 2019. An investigation of plant growth by the addition of glauconitic fertilizer, Applied Clay Science DOI: 10.1016/j.clay.2019.105178

12.Rudmin, M., Banerjee, S., Mazurov, A., Makarov, B. and Martemyanov, D. et al. (2017). Economic potential of glauconitic rocks in Bakchar deposit (S-E Western Siberia) for alternate potash fertilizer. Applied Clay Science, 150: 225-233.

13.Sarkar, D., Shikha, Rakesh, S., Ganguly, S. and Rakshit, A. (2017). Management of increasing soil pollution in the ecosystem. Advances in Research, 12(2): 1-9.

14.Zorb, C., Senbayram, M. and Peiter, E. 2014. Potassium in agriculture - status and perspectives.