SALIH, R. F.; OSMAN, G. A.; AZIZ, L. H. GROWTH AND YIELD RESPONSE OF FLAX (LINUM USITATISSIMUM L.) TO DIFFERENT RATES OF CHARCOAL AND POTASSIUM FERTILIZER IN ERBIL, KURDISTAN REGION-IRAQ. Journal of Duhok University, v. 22, n. 2, p. 71-80, 19 Feb. 2020.