Abdul Hameed, Muhammad Islam, Abdul Qayyum, Rabia Siddiqui and Umar Draz. Optimizing cotton productivity: A comprehensive analysis of categorizing factor levels. JPAA [Internet]. 2023 Dec. 4 [cited 2025 Aug. 2];8(3). Available from: https://ojs.aiou.edu.pk/index.php/jpaa/article/view/1821