Effect of Ethephon, Boron and Zinc Spray on Anatomical Characters of Sunflower Crop (Helianthus annuus L.). Iraqi Journal of Science, [S. l.], v. 54, n. 4Appendix, p. 1078–1083, 2024. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12425.. Acesso em: 10 may. 2024.