Abood, Mohammed A., et al. “EFFECT OF POTASSIUM FERTILIZER, DEFICIT IRRIGATION AND ORGANIC MATTER ON COTTON TOLERANCE TO DROUGHT. ”. Diyala Agricultural Sciences Journal , vol. 6, no. 1, June 2014, pp. 202-14, https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/1669.