Table 1 Analysis of selected sample characteristics as a function of sample site type.

Characteristic	Sugarcane	Reference		Grazed
		Channel floor	Channel wall	Channel floor	Channel wall
	Mean ± sd	Mean ± sd	Mean ± sd	Mean ± sd	Mean ± sd
Carbon (%)	1.11 ± 0.48^a	0.49 ± 0.25^bc	0.83 ± 0.22^ab	0.24 ± 0.12^c	0.71 ± 0.08^abc
WDC (g kg⁻¹)	1.67 ± 1.06^b	1.78 ± 0.74^ab	3.03 ± 0.65^a	0.78 ± 0.19^b	1.79 ± 0.38^ab
Electrophoretic mobility (µmcm Vs⁻¹)	−1.88 ± 0.43	−1.64 ± 0.07	−1.57 ± 0.06	−1.51 ± 0.34	−1.49 ± 0.03
Z-average diameter (nm)	525.7 ± 27.0^a	416.8 ± 25.1^b	409.8 ± 33.4^b	550.3 ± 71.9^a	523.7 ± 38.6^a
Nitrogen (mg kg⁻¹)	913.7 ± 346.6^a	294.0 ± 130.9^bc	735.6 ± 109.6^a	191.9 ± 170.3^c	640.1 ± 39.8^ab

For gully channel samples, the three cross-sections were averaged to get a single data point for each gully. Data expressed as mean ± one standard deviation (SD = standard deviation; n = 3 for gullies and 4 for sugar cane). Electrophoretic mobility and Z-average diameter were measured on water dispersible clay (WDC) suspensions whereas other data was collected on whole samples. There were no significant differences between treatments in electrophoretic mobility (Pr > F = 0.34). Means with the same superscript letter are not significant different at α = 0.05.

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