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 2026 Jun. 4];54(2). Available from: https://epubs.icar.org.in/index.php/OIJR/article/view/75176