Determinantes of the economic efficiency of white onion production (crystal ) in Nineveh Governorate for the production season 2022 ( a field study in Shekhan district ). MAGRJ [Internet]. 2024 Jun. 1 [cited 2026 Jun. 22];52(2):146-65. Available from: https://radab.uomosul.edu.iq/index.php/magrj/article/view/58219