Hameed A, Islam M, Qayyum A, Siddiqui R, Draz U. Optimizing cotton productivity: A comprehensive analysis of categorizing factor levels. J. Pure Appl. Agric. [Internet]. 2023 Dec. 4 [cited 2026 Aug. 18];8(3). Available from: https://ojs.aiou.edu.pk/index.php/jpaa/article/view/1821