TABLE 1.

Pore classes (m³/m³) derived from the fits of the van Genuchten (1980) equation to the water retention curves shown in Figure 4, assuming a maximum diameter of micropores of 30 µm (i.e. ψ _mic/mes = −100 cm; note that macroporosity is assumed zero in both treatments)

Treatment	Textural			Structural			Total
	ϕ t(mic)	ϕ t(mes)	ϕ t	ϕ s(mic)	ϕ s(mes)	ϕ s	ϕ mic	ϕ mes	ϕ mat
A	0.295	0.005	0.3	0.120	0.168	0.288	0.415	0.173	0.588
D				0.118	0.147	0.265	0.413	0.152	0.565