Maya and WRB Soil Classification in Yucatan, Mexico: Differences and Similarities

Table 6

Chemical and physical properties of soils located in plains at Hocabá, Yucatán, México.

Soil horizon	Depth cm	Dry color	Structure AS, ASi	PSD			TC	Fgr %	Cgr %	CO3 %	pH	OM %	CEC cmol^+ kg^−1	Exchange cations cmol^+ kg^−1				BS %
				Sand %	Clay %	Silt %								Ca	Mg	Na	K
Lithic Leptosol Rhodic
A	0–9	5YR 4/4	SBK, VF-M	43.0	19.0	38.0	L	0	0	0.4	7.4	14.0	47.2	23.6	16.6	0.1	2.8	100
Leptic Cambisol
A	0–11	5YR 3/3	SBK, F-H	48.8	20.6	31.4	L	0	0	0.1	7.6	15.8	39.7	31.5	2.7	0.3	0.8	89
Bw1	11–23	5YR 3/3	SBK, F-H	48.0	19.6	32.4	L	0	0	0.1	7.6	13.8	47.8	31.0	2.9	0.1	4.4	81
Bw2	23–38	5YR 3/2	ABK, VF-L	46.1	24.5	29.4	L	0	0	0.1	7.5	11.7	29.2	25.8	3.2	0.2	0.4	100
Endoskeletal Cambisol
A1	0–9	5YR 3/3	SBK, VF-M	42	26	32	L	0	0	0.1	7.2	17.2	51.2	32.0	21.4	0.1	0.8	100
A2	9–17	5YR 4/4	SBK, VF-L	50	22	28	L	0	0	0.1	7.0	11.0	49.9	27.8	25.3	0.7	0.6	100
Bw1	17–39	5YR 4/6	ABK, VF-L	51	21	28	L	0	0	0.1	6.9	10.0	43.2	30.5	15.9	0.1	0.3	100
Bw2	39–56	5YR 4/6	ABK, VF-L	58	16	26	CL	0	20	0.1	7.0	6.9	44.1	29.2	18.8	0	0.2	100
C	56–100	5YR 4/6	ABK, VF-L	47	19	33	L	23	67	0.1	7.2	7.2	29.2	20.5	12.2	0.1	0.3	100
Endoleptic Cambisol
A1	0–4	5YR 4/3	GR, F-H	45.1	21.6	33.3	L	5	0	0.5	7.4	18.8	46.0	39.0	3.6	0.2	2.3	100
A2	4–22	5YR 4/4	SBK, VF-M	49.0	19.6	31.4	L	0	0	0.1	7.3	12.3	33.2	38.5	2.3	0.1	1.0	100
Bw1	22–33	5YR 3/6	ABK, VF-M	54.9	15.7	25.5	CL	5	0	0.1	7.3	8.1	29.0	30.0	2.5	0.1	0.4	100
Bw2	33–55	5YR 4/3	ABK, VF-L	61.8	16.5	22.5	CL	3	0	0.4	7.5	9.1	25.5	19.5	1.2	0.1	0.3	100
Bw3	55–75	5YR 4/3	ABK, VF-L	51.0	17.5	32.5	L	2	0	1.5	7.5	5.5	34.8	35.5	1.0	0.1	0.2	100
Haplic Luvisol Rhodic
A1	0–6	5YR 2.5/3	GR, F-H	47.1	25.5	27.5	L	0	0	0.1	7.4	11.4	36.2	21.6	3.6	0.1	1.1	73
A2	6–20	5YR 3/3	SBK, F-M	48.0	26.0	26.0	L	0	0	0.1	6.6	8.1	25.5	12.6	2.5	0.3	0.3	61
Bt1	20–45	2.5YR 3/6	ABK, M-L	40.2	37.7	22.1	CL	0	0	0.1	6.7	3.8	24.9	15.3	0.9	0.2	0.3	67
Bt2	45–85	2.5YR 3/6	ABK, M-L	30.4	47.7	22.5	C	0	0	0.1	7.0	3.1	19.0	16.2	1.8	0.4	0.3	97
Bt3	85–109	2.5YR 4/6	ABK, M-L	36.8	39.2	24.0	CL	0	0	0.1	7.1	3.3	15.1	16.2	1.0	0.3	0.3	100
Bt4	109–150	2.5YR 4/6	ABK, M-L	34.3	37.3	28.4	CL	0	0	0.1	7.2	2.7	10.4	14.8	3.2	0.3	0.3	100

PSD: particle size distribution. AS: aggregates shape (GR: granular, SBK: subangular blocky, ABK: angular blocky). ASi: aggregates size (VF: very fine, F: fine, M: medium). Stability (L: low, M: moderate, H: high). L: loam; CL: clay loam; C: clay; TC: textural class. Fgr: fine gravels (<2 cm), Cgr: coarse gravels (>2 cm); OM: organic matter, CEC: cation exchange capacity, BS: base saturation.