Effects of varying tillage practices and weed control methods on the efficacy of infiltration models.

The results showed that, though the different weed control methods did not significantly (p>0.05) influence soil infiltration rate, when combined with tillage systems in a factorial design, there was a highly significant interaction effect, p < 0.000, F (6) = 5.530 ( Table 6 ).

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The values of soil sorptivity, S, obtained by the Philip infiltration model in Table 8 depict an increasing trend in the order of NT x H (43.61 mm / h ) > NT x MAT (36.19 mm / h ) > RT x NW (27.40 mm / h ) > PHR x H (23.257 mm / h ) > RT x H (16.45 mm / h ) NT x NW (16.0 mm / h ) > RT x MAT (15.040 mm / h ) > PHR x MAT (11.12 mm / h ) > DPHR x MAT (10.15 mm / h ) > DPHR x NW (10.0 mm / h ) > PHR x NW (8.881 mm / h ) > DPHR x H (6.295 mm / h ).

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