Phongpan S, R. Mosier A, Sookthongsa J. Effect of Rice Straw and Rice Hull Ash Addition on the Efficiency of Urea Broadcast to a Lowland Rice Field. Thai Agric.Res.J. [internet]. 2004 Mar. 28 [cited 2026 Oct. 1];22(1):9-23. available from: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/212206