Abstract:Limestone mining leaves the ex-mine land with poor soil chemical quality. Humic substances can be used as fertilizer to increase macronutrient availability in the soil and improve pH. The application of coal ash can improve the soil’s chemical, physical, and biological properties because it has a pH value, high organic C content, available P, and basic cations such as K, Na, Ca, and Mg. This research aims to determine the effect and interaction of humic substances and bottom ash interaction with different dose… Show more
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