Pongnak, W, Soytong, K. Research and development on phosphorus and potassium biofertilizer. Int. J. Agric. Tech. [internet]. 2019 May 15 [cited 2025 Nov. 18];15(3):465-70. available from: https://li04.tci-thaijo.org/index.php/IJAT/article/view/8231