Characterization and Classification of Soils of Abobo Area, Western Ethiopia

Table 6

Soil pH, electrical conductivity, and calcium carbonate.

Pedon	Horizon	Depth (cm)	pH (1 : 2.5)		ΔpH	EC (dS m^−1)	CaCO3 (%)
			(H2O)	(KCl)
A-1	Ap	0–18	6.0	5.1	0.9	0.10	0.23
	Bw1	18–25	6.1	5.6	0.5	0.10	0.19
	Bw2	25–35	6.0	5.3	0.7	0.08	0.15
	CB	35–110	6.3	5.6	0.7	0.08	0.24
A-2	A	0–18	6.5	5.8	0.7	0.15	0.25
	Ad	18–27	6.7	5.9	0.8	0.10	0.17
	Bt1	27–37	6.1	5.4	0.7	0.07	0.20
	Bt2	37–50	6.3	5.6	0.7	0.07	0.35
	BC	50–80	6.4	5.7	0.7	0.05	0.31
A-3	Ap	0–22	6.7	5.9	0.8	0.23	0.28
	A	22–33	6.5	5.7	0.8	0.21	0.25
	Bt1	33–45	6.3	5.6	0.7	0.14	0.23
	Bt2	45–63	6.3	5.5	0.8	0.09	0.25
	BC	63–85	6.0	5.3	0.7	0.09	0.27
A-4	Ap	0–10	6.6	5.8	0.8	0.16	0.29
	A	10–19	6.0	5.4	0.6	0.10	0.21
	Bt1	19–37	6.3	5.6	0.7	0.09	0.14
	Bt2	37–75	6.1	5.2	0.9	0.06	0,17
	BC	75–90	6.2	5.5	0.7	0.06	0.13
A-5	Ap	0–17	5.5	4.7	0.8	0.11	0.16
	A	17–55	5.7	4.9	0.8	0.08	0.15
	Bss1	55–116	6.1	5.0	1.1	0.06	0.22
	BCss2	116–150	6.5	5.8	0.7	0.06	0.27
A-6	Ap	0–20	7.1	6.4	0.7	0.24	0.39
A-7	A	0–29	6.1	5.1	1.0	0.15	0.19
	Bss1	29–48	6.1	5.3	0.8	0.13	0.21
	Bss2	48–105	6.6	5.3	1.3	0.07	0.29
	BCss	105–150+	6.8	5.9	0.9	0.16	0.31