TABLE 3.

Pore‐change factors in Equation 21

Pore class	Pore‐change factors
	Root production		Earthworm bioturbation
	Growth, f g	Decay, f d	Casting, f c	Ingestion, f s
Macropores	0	−f r(c)	$‐\left(1+{\epsilon }_{\text{casts}}\right)$	$‐\left(1+\epsilon \right)$
Mesopores	$‐\left(\frac{{\varphi }_{\text{mes}}}{{\varphi }_{\text{mes}}+{\varphi }_{\text{mic}}}\right)$	f r(c) – 1	$\left(1‐f_{\text{casts}\left(\text{mic}\right)}\right){\epsilon }_{\text{casts}}$	$\left(\frac{{\varphi }_{\text{mes}}}{{\varphi }_{\text{mes}}+{\varphi }_{\text{mic}}}\right)\epsilon$
Micropores	$‐\left(\frac{{\varphi }_{\text{mic}}}{{\varphi }_{\text{mes}}+{\varphi }_{\text{mic}}}\right)$	0	$f_{\text{casts}\left(\text{mic}\right)}{\epsilon }_{\text{casts}}$	$\left(\frac{{\varphi }_{\text{mic}}}{{\varphi }_{\text{mes}}+{\varphi }_{\text{mic}}}\right)\epsilon$
Sum	−1	−1	−1	−1