Utilization of coal burning waste fly ash as a soil improving material in red yellow podsolic soil

Asia Afriyani (Departement of Environment Science, Serasan University, Muara Enim 31312, South Sumatera, Indonesia)
Ali Martinus (Departement of Environment Science, Serasan University, Muara Enim 31312, South Sumatera, Indonesia)
Inneke Fratiwi (Departement of Environment Science, Serasan University, Muara Enim 31312, South Sumatera, Indonesia)

Jurnal Lahan Suboptimal
Vol. 14 No. 2 (2025): JLSO

This research aimed to characterize and test the chemical properties of red-yellow podzolic soil and fly ash. The experiment was conducted using polybags with various dosage levels of 2 types of red-yellow podzolic soil, as well as fly ash. Dolomite was used as a control. The experiment used 3 types of experiments with 3 repetitions on the soil (A1=10 g of fly ash /polybag, A2=15 g of fly ash/polybag, A3=20 g of fly ash/polybag, and A0=10 g of dolomite/polybag as a control). The results showed that the application of fly ash waste can increase the pH of podzolic soil. There was an increase in K-dd from 0.34 to 1.36. Al-dd analysis of the addition of fly ash ameliorant Al-dd levels decreased quite significantly with an average of 5.26‒7.16. Al-dd levels were very low in treatment A3 with the addition of 20 g/polybag. H-dd analysis on Red and Yellow Podzolic soils resulted in an increase in the initial H-dd of the soil from 0.4 to 4.61‒7.16. The highest H-dd was in A2 with the addition of 15 g of fly ash/polybag and the lowest H-dd iss in treatment A3 with the addition of 20 g/polybag.