Activation unproductive coal powder with urea to improve chemical properties of ultisols
พ.ศ. 2560
Activation of Sub-bituminous Powder with Urea and Dolomite to Improve Nutrient Content of Ultisols and the Growth of Oil Palm (Elaeis guineensis Jacq) Seedlings
พ.ศ. 2561
Improvement chemical properties of oxisols and rice production with humic substances from sub-bituminous coal Indonesia
พ.ศ. 2562
Effect of Low NaOH Concentration on Compressive Strength and Products of High Calcium Geopolymer