Jasim, Abdulrazzak A., Mohammed M. Ali, and Makaya K. Alik. 2009. “EFFECT OF TILLAGE SYSTEMS AND FERTILIZERS ON GROWTH AND SEED YIELD OF SUNFLOWER CROP (Helianthus Annuus L.) ”. Diyala Agricultural Sciences Journal 1 (1):95-107. https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/3200.