Status and Causes of Soil Salinization of Irrigated Agricultural Lands in Southern Baja California, Mexico

Table 5

Available micronutrients in soils under the investigated area.

Soil	Depth (cm)	T-C (g kg^−1)	T-N (g kg^−1)	Available P (mg kg^−1)	Available micronutrients (mg kg^−1)
Horizon					Mn	Fe	Cu	Zn
Site 1-1; no cultivation (before application of diluted sulfuric acid)
A1	0–10	1.15	0.75	0.08	2.81	2.52	0.22	0.22
A2	10–20	1.04	0.66	0.06	2.08	2.32	0.21	0.15
C11	20–30	0.92	0.33	0.08	2.54	2.88	0.19	0.12
C12	30–40	0.55	0.25	0.12	3.65	2.50	0.18	0.12
C21	40–50	0.56	0.31	0.11	3.22	2.03	0.28	0.14
C22	50–60	0.58	0.28	0.15	3.54	1.98	0.21	0.21
C31	60–80	0.56	0.27	0.13	2.95	1.84	0.18	0.18
C32	80–90	0.52	0.22	0.17	2.44	2.32	0.19	0.13
C41	90–105	0.55	0.28	0.15	2.69	2.11	0.21	0.12
C42	105–115+	0.53	0.26	0.17	2.36	1.88	0.19	0.14
Site 1-2; after cultivation of fulijol beans (after application of diluted sulfuric acid)
Ap11	0–10	2.42	0.89	0.03	2.76	2.54	0.19	0.22
Ap12	10–18	2.62	0.87	0.04	2.37	2.29	0.17	0.20
Ap2	18–28	2.74	0.87	0.06	2.29	2.82	0.16	0.20
C11	28–37	1.73	0.77	0.11	2.73	4.07	0.16	0.19
C12	37–50/58	1.65	0.70	0.57	10.56	13.57	0.24	0.20
C21	50/58–62	1.28	0.47	0.37	10.36	16.90	0.28	0.16
C22	62–80	0.91	0.48	0.38	9.90	11.12	0.27	0.14
C23	80–105	0.81	0.29	0.27	7.20	9.25	0.24	0.13
C3	105–115+	0.58	0.37	0.12	3.11	3.06	0.18	0.10
Site 2; under cultivation of chille guerito
Ap1	0–8	2.23	0.64	0.28	9.21	3.48	0.46	0.31
Ap2	8–16	2.49	0.50	0.31	10.03	4.05	0.50	0.28
C11	16–29	2.00	0.53	0.36	5.19	3.38	0.42	0.22
C12	29–40	1.70	0.47	0.27	7.12	2.95	0.50	0.19
C21	40–55	1.99	0.85	0.31	7.56	2.43	0.52	0.15
C22	55–65/71	1.84	0.88	0.17	8.32	1.86	0.55	0.14
C3	65/71–75+	1.81	0.81	0.38	6.84	1.80	0.50	0.14
Site 3; under cultivation of chille guerito
Ap1	0–10	3.02	0.95	0.20	17.49	2.38	0.83	0.22
Ap2	10–22	3.12	1.22	0.17	8.37	2.11	0.77	0.17
C11	22–33	2.09	0.78	0.18	7.02	2.50	0.61	0.10
C12	33–45	1.75	0.79	0.21	7.20	3.19	0.61	0.10
C21	45–55	1.70	0.84	0.18	7.77	3.73	0.66	0.09
C22	55–65	1.50	0.95	0.19	8.42	3.65	0.63	0.07
C3	65–75+	1.45	0.75	0.16	8.46	3.17	0.62	0.09
Site 4-1; under cultivation of chille guerito
Ap1	0–10	6.60	1.34	0.64	11.78	2.14	1.22	0.30
Ap2	10–22	7.10	1.55	1.06	13.08	2.31	1.22	0.32
Bw	22–35	6.52	1.27	1.20	7.50	2.76	1.28	0.19
Bk	35–46/49	11.32	0.88	0.94	5.92	1.76	0.91	0.17
Bkm	46/49–60+	15.21	0.97	0.55	4.61	1.85	0.80	0.16
Site 4-2; under cultivation of fulijol beans
Ap1	0–10	11.84	1.17	1.58	6.38	2.13	1.04	0.27
Ap2	10–20/25	11.03	1.23	1.54	6.95	2.81	1.12	0.18
Bk	20/25–39/41	15.96	0.72	0.68	2.23	1.71	0.72	0.11
BC	39/41–66/71	11.04	1.06	0.57	3.26	0.99	0.49	0.12
Bkm	66/71–75+	9.87	0.79	0.85	3.20	0.56	0.38	0.09
Site 5; under cultivation of chille guerito
Ap1	0–5	15.19	1.85	2.56	7.11	3.58	1.56	0.18
Ap2	5–17/32	17.46	2.84	2.36	5.66	3.55	1.57	0.22
Bk11	17/32–35	12.30	1.51	1.09	8.58	3.84	1.64	0.19
Bk12	35–55	11.91	1.12	1.01	10.88	3.67	1.79	0.15
Bk2	55–60+	11.64	1.19	1.28	10.35	3.29	1.70	0.15