Table 1. Cation concentrations and the EDP (mean ± SE) of soils from the ITE.

Water regime	Landscape position	Na (cmolc kg−1)	K (cmolc kg−1)	Ca (cmolc kg−1)	Mg (cmolc kg−1)	EDP (%)
Control	Lowland	0.19 ± 0.02	1.27 ± 0.08	26.24 ± 1.16	5.80 ± 0.45	3.50 ± 0.18
Control	Upland	0.18 ± 0.03	1.35 ± 0.10	19.92 ± 0.40	6.97 ± 0.22	3.72 ± 0.14
Irrigated	Lowland	0.30 ± 0.05	1.26 ± 0.08	26.23 ± 0.75	6.26 ± 0.38	3.88 ± 0.22
Irrigated	Upland	0.24 ± 0.04	1.52 ± 0.06	23.12 ± 0.43	6.93 ± 0.36	4.21 ± 0.22