In addition, bio-charcoal can decrease the density of the soil or add soil, prunes. Because JavaScript is the cultivation of bio-coal total surface area greater than sand and clay. Therefore, it can be added to the total surface area of soil cultivation, Jaya increased bio-charcoal into the soil when (Kookana et al, 2011), although the research study did not analyze the effect of bio-coal to reduce the density of the Earth. But there is research that indicates whether to include bio-charcoal can decrease the density of the soil. (Vaccari et al., 2011; Afeng et al., 2012)
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