& Al- Hassan, Mahmood. “REGULATION OF TILLERING IN WHEAT AND ITS RELATIONSHIP WITH GRAIN YIELD 1.CONTRIBUTION PERCENTAGES OF THE MAIN STEM AND PRIMARY TILLERING THE NUMBER OF SPIKES AND GRAIN YIELD”. IRAQI JOURNAL OF AGRICULTURAL SCIENCES 48, no. 2 (April 19, 2017). Accessed May 19, 2024. https://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/420.