Fig. 3. Maximum number of effective pores per unit area, N_C0, (Eq. [7], black points) and number of effective water-transmitting pores per unit area, N, (Eq. [10], white points) for two consecutive water soil tensions measured under conventional tillage (CT), reduced tillage (RT), and no-tillage (NT). Macropores are defined as those pores that drain at > –4 cm and mesopores as those pores draining at between –4 and –14 cm. Asterisks indicate significant difference between N_C0 and N (P < 0.05, t-test).