Are power laws that estimate fractal dimension a good descriptor of soil structure and its link to soil biological properties?

► Biologists use indices such as mean weight diameters for describing soil structure. ► The exponent D of power laws of number-size distributions has been used as well. ► We showed that D is a consistent correlate of indices such as mean weight diameter. ► The fragmentation described by D is thus interpretable in terms of simpler indices. ► This likely depends on biotic components impacting the largest size fractions.