International Scholarly Research Notices

Research Article

Extractable Al and Soil Solution Ionic Concentrations in Strongly Leached Soils from Northwest Iberia: Effects of Liming

Table 3

Content of Al (cmol_c kg−1) extracted by 1 M KCl (A), 0.33 M LaCl₃ (B), and 0.5 M CuCl₂ (C), values of the differences and ratios between extractants in studied soils. Symbols: D (LaCl₃-KCl), E (CuCl₂-KCl), F (CuCl₂-LaCl₃), G (LaCl₃/KCl), H (CuCl₂/KCl), I (CuCl₂/LaCl₃), and J (CuCl₂-LaCl₃)/CuCl₂. Means in the same horizon followed by different letters are significant at by the Tukey test.


Pedons	Hor	Depth	A	B	C	D	E	F	G	H	I	J

Umbrisols
1	Ah1	0–20	2.79a	3.59b	7.63c	0.80	4.84	4.04	1.29	2.73	2.13	206.42
	Ah2	20–45	3.32a	3.49b	13.50c	0.17	10.18	10.01	1.05	4.07	3.87	103.70
2	Ah1	0–15	2.63a	4.44b	8.78c	1.81	6.15	4.34	1.69	3.34	1.98	122.44
	Ah2	15–35	2.02a	2.89b	9.69c	0.87	7.67	6.80	1.43	4.80	3.35	105.78
3	Ah1	0–20	2.04a	3.31b	5.14c	1.27	3.10	1.83	1.62	2.52	1.55	340.47
	Ah2	20–40	2.50a	4.06b	8.22c	1.56	5.72	4.16	1.62	3.29	2.02	197.69
4	Ah1	0–20	1.30a	2.09b	3.52c	0.79	2.22	1.43	1.61	2.71	1.68	355.11
	Ah2	20–45	1.86a	2.91b	6.35c	1.05	4.49	3.44	1.56	3.41	2.18	141.73

Cambisols
5	Ah	0–15	2.31a	2.76a	8.76b	0.45	6.45	6.00	1.19	3.79	3.17	182.65
	A/B	15–30	2.17a	2.92a	9.48b	0.75	7.31	6.56	1.35	4.37	3.25	137.13
6	Ah1	0–15	1.92a	2.68a	7.84b	0.76	5.92	5.16	1.40	4.08	2.93	178.57
	A/B	15–30	2.59a	3.15a	10.89b	0.56	8.30	7.74	1.22	4.20	3.46	114.78

Luvisols
7	Ah	0–15	0.86a	1.32b	2.05b	0.46	1.19	0.73	1.53	2.38	1.55	97.56
	Bt	15–30	1.64a	3.78b	4.05b	2.14	2.41	0.27	2.30	2.47	1.07	18.52
8	Ah	0–20	0.67a	1.34b	1.77b	0.67	1.10	0.43	2.00	2.64	1.32	56.50
	Bt	20–35	1.74a	3.72b	4.13b	1.98	2.39	0.41	2.14	2.37	1.11	18.16

Regosols
9	Ah1	0–15	1.31a	1.97a	5.17b	0.66	3.86	3.20	1.50	3.95	2.62	178.92
	Ah2	15–30	2.15a	2.80a	11.81b	0.65	9.66	9.01	1.30	5.49	4.22	169.35
10	Ah	0–20	3.09a	4.11a	11.14b	1.02	8.05	7.03	1.33	3.61	2.71	163.82
	C1	20–40	1.95a	3.31b	8.03c	1.36	6.08	4.72	1.70	4.12	2.43	68.49
11	Ah	0–20	0.86a	2.69b	3.50b	1.83	2.64	0.81	3.13	4.07	1.30	192.86
	A/C	20–45	0.67a	2.29b	3.14b	1.62	2.47	0.85	3.42	4.69	1.37	47.77