There are inevitable accompanying differences in the physical and other chemical properties
of biochar. Scanning electron microscopy (SEM) is often used to describe the physical
structure of biochar, and the architecture of cellulosic plant material is clearly retained (Figure
6). It has been suggested that the porous structure of biochar can explain its impact on soil
water holding and adsorption capacity (Day et al., 2005; Ogawa et al., 2006; Yu et al., 2006).