Chemical forms of phosphorous and physicochemical properties of acid soils of Cheha and Dinsho districts, southern highlands of Ethiopia

Environmental Systems Research

Table 4 Exchangeable cations and exchange properties

Soil	Exchangeable cations and CEC (cmol_ckg⁻¹)									Percent saturation (%)			K/Mg
Soil	Ca	Mg	K	Na	TEB	exAc	exAl	CEC	ECEC	PAcS	PAlS	PBS	Ratio
SC1	4.21	0.98	0.20	0.04	5.43	2.61	1.54	19.15	10.56	13.63	8.04	28.36	0.20
SC2	8.45	2.23	0.26	0.09	11.03	2.18	0.82	23.88	17.77	9.13	3.43	46.19	0.12
SC3	4.91	1.11	0.25	0.09	6.36	2.38	1.29	20.88	11.12	11.40	6.18	30.46	0.23
SC4	7.86	1.69	0.28	0.11	9.96	1.57	0.35	26.98	14.09	5.82	1.30	36.92	0.17
SC5	8.95	2.38	0.30	0.11	11.74	1.09	0.42	22.81	15.39	4.78	1.84	51.47	0.13
SC6	6.40	1.42	0.29	0.12	8.25	2.11	0.43	29.54	12.93	7.14	1.46	27.93	0.20
SC7	9.42	2.05	0.32	0.16	11.92	2.29	0.49	25.03	16.77	9.15	1.96	47.62	0.16
SD1	13.30	2.87	0.34	0.25	16.76	0.59	0.28	33.70	18.73	1.75	0.83	49.73	0.12
SD2	9.29	2.14	0.32	0.21	11.97	0.87	0.32	29.80	14.44	2.92	1.07	40.17	0.15
SD3	14.78	4.39	0.41	0.38	19.96	0.62	0.24	34.03	25.95	1.82	0.71	58.65	0.09
SD4	10.87	3.52	0.34	0.20	14.93	0.56	0.22	29.14	17.87	1.92	0.75	51.24	0.10
SD5	12.90	3.77	0.37	0.23	17.27	0.59	0.21	30.66	21.25	1.92	0.68	56.33	0.10
Mean	9.28	2.38	0.31	0.17	12.13	1.46	0.55	27.13	16.41	5.95	2.35	43.75	0.13

TEB total exchangeable bases, exAc exchangeable acidity, exAl exchangeable Aluminum, CEC cation exchange capacity of soil, ECEC Effective cation exchange capacity, PAcS percent acid saturation, PAlS percent aluminium saturation, PBS percent base saturation