Applied and Environmental Soil Science

Research Article

Assessment and Characterization of Agricultural Salt-Affected Soils around Abaya and Chamo Lakes, South Ethiopia Rift Valley

Table 5

Salt-affected soils soil reaction, electric conductivity, exchangeable bases, exchangeable sodium percentages, and soluble chemical properties.


Parameters	Around Chamo lake						Around Abaya lake
	Pit, CL01			Pit, CL02			Pit, AL01			Pit, AL02			Pit, AL03
	Depth (cm)			Depth (cm)			Depth (cm)			Depth (cm)			Depth (cm)
	0–20	20–40	40–60	0–20	20–40	40–60	0–20	20–40	40–60	0–20	20–40	40–60	0–20	20–40	40–60

pH	10.30	9.90	9.60	10.30	9.70	9.40	9.20	8.60	8.30	7.70	9.80	9.50	10.30	9.70	9.40
EC (ds/m)	3.27	1.38	1.32	3.21	2.34	1.64	1.93	0.92	0.67	1.02	1.19	1.86	3.15	1.58	1.31
Ex. Na	57.84	54.92	53.92	93.68	61.42	53.48	28.26	17.18	6.68	4.16	26.77	48.18	33.27	44.63	34.4
Ex. K	1.35	0.80	0.50	1.37	1.27	1.22	2.32	1.20	0.91	0.76	0.68	1.00	1.25	1.19	1.17
Ex. Ca	6.05	2.13	0.59	2.86	2.20	0.78	7.94	6.08	7.74	25.28	10.52	6.44	3.66	2.81	2.34
Ex. Mg	2.57	2.62	3.41	1.32	3.33	3.95	10.79	13.29	13.90	5.10	4.62	3.92	1.56	3.47	5.33
SAR (%)	27.86	35.64	38.13	64.8	36.94	34.78	9.23	5.52	2.03	1.07	9.73	21.17	20.59	25.19	17.57
ESP (%)	40.23	51.82	55.53	95.26	53.75	50.53	12.48	6.95	1.75	0.32	13.22	30.26	29.41	36.25	24.90
S-a-s-c^a	Sodic	Sodic	Sodic	Sodic	Sodic	Sodic	Non	Non	Non	Non	Non	Non	Sodic	Sodic	Sodic
Na⁺	565.36	481.50	445.07	947.83	547.51	496.19	318.52	160.20	166.97	72.01	249.60	509.60	715.65	383.22	432.90
K⁺	42.65	26.27	23.58	44.72	33.51	30.11	36.43	23.73	22.87	14.47	15.10	29.65	25.64	18.00	23.12
Ca²⁺	126.00	109.00	121.00	163.50	130.00	103.00	177.60	200.00	100.00	80.00	130.00	160.00	230.00	180.00	100.00
Mg²⁺	189.00	109.00	121.00	43.60	80.00	154.50	122.10	120.00	230.00	250.00	170.00	90.00	120.00	180.00	175.00
Cl⁻	302.02	276.64	272.98	184.43	279.18	159.75	156.51	276.08	205.3	179.63	259.44	290.18	141	131.98	179.63
SO₄⁻²	5.10	6.87	4.31	67.60	5.40	5.05	9.87	6.53	2.84	6.77	3.87	6.53	11.39	4.31	3.82
NO₃⁻	0.31	0.03	0.01	6.37	1.46	0.17	0.00	0.02	0.07	0.03	0.00	0.06	2.09	0.41	0.39
CO₃²⁻	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil	Nil
HCO₃⁻	33.93	11.43	14.00	30.00	18.52	3.33	12.50	17.50	12.00	9.00	18.18	30.00	65.00	12.50	3.03

^aS-a-s-c, salt-affected soil class; sodic, sodic soil; and non, non-saline-non-sodic soil.