Kumar D, Singh AP, Kumar A. Nutrient uptake and yield of rice (Oryza sativa L.) as influenced by coal-derived potassium humate and chemical fertilizers. ORYZA [Internet]. 2017 Oct. 20 [cited 2025 Oct. 20];54(2). Available from: http://epubs.icar.org.in/index.php/OIJR/article/view/75176