Suriya-arunroj, D., and P. Chaiwat. “Indentiffication Nutrients Limiting Rice Grwoth in Soils of Northeast Thailand under Water-Limiting and Non-Limiting conditions”. Thai Agricultural Research Journal, vol. 18, no. 3, Dec. 2000, pp. 246-58, doi:10.14456/thaidoa-agres.2000.19.