Rezaei , Mohsen , Ilkaee, MohammadNabi, Asgharipour, Mohammad Reza, Armin, Mohammad (2025) ‘Meta-analysis of the effect of nitrogen in the form of urea on seed yield and oil percentage of sunflower seeds in Iran and some countries of the world’, Sustainable Agricultural Science Research, 5(2), pp. 1-25. doi:https://doi.org/10.71667/sarj.2025.1193151