Effectivity of Humic Substance Extracted from Palm Oil Compost as Liquid Fert…

Humic substances extracted from compost materials were proven able to chelate heavy metals. While the waste from Palm oil as the source material of compost is increasing, consequently the humic substances production from palm oil waste is promising. On the other hand, agricultural lands that were treated with high input which caused heavy metal accumulation (pollutant) up to hazardous level als…