The Scientific World Journal

Research Article

Degradation Rate/Vulnerability Potential and Fertility Status of Luvisols in the Mandara Mountains (Far-North Cameroon)

Table 3

Physicochemical characteristics and summary statistics of the soils under the forest reserve.


Samples	E1	E2	E3	E4	E5	E6	E7	E8	E9	E10	Min	Max	Mean	SD	CV

Sand	67.6	70.6	80.6	60.6	78.6	73.6	78	74.7	75.7	73.7	60.6	80.6	73.88	5.84	0.08
Silt	22	22	12	26	13	17	13.6	17.4	18.4	18.4	12	26	17.67	4.34	0.25
Clay	10.4	7.4	7.4	13.4	8.4	9.4	8.4	7.9	5.9	7.9	5.9	13.4	8.45	2.07	0.24
pH_H2O	6.1	6.5	6.5	5.2	6.2	6.4	6.4	6.6	6.8	7.1	5.2	7.1	6.39	0.48	0.07
pH_KCl	4.9	5.3	5.4	3.9	5.3	5.3	5.5	4.7	5	5.2	3.9	5.5	5.05	0.45	0.09
OC (%)	2.23	1.21	1.34	2.28	1.12	1.45	0.34	1.9	2.09	2.68	0.34	2.68	1.6	0.69	0.43
OM (%)	3.85	2.09	2.31	3.93	1.92	2.51	0.59	3.27	3.61	4.63	0.59	4.63	2.76	1.2	0.43
N (%)	0.1	0.1	0.07	0.13	0.1	0.07	0.08	0.04	0.09	0.04	0.02	0.13	0.08	0.03	0.42
C/N	22.44	12.46	20.14	17.04	11.54	21.65	4.22	45.13	24.5	63.88	4.22	63.9	25.69	17.32	0.67
Ca (cmol·kg⁻¹)	13.52	8.8	7.92	9.76	10.96	12.16	13.5	7.68	9.52	10.56	7.68	13.52	10.41	2.01	0.19
Mg (cmol·kg⁻¹)	6.4	6.32	5.6	3.76	4.72	4.96	6.56	2.48	3.6	4.88	2.48	6.56	4.76	1.39	0.29
K (cmol·kg-1)	4.32	6	5.77	10.94	8.29	1.3	1.66	6.04	0.73	0.91	0.73	10.94	4.59	3.45	0.71
Na (cmol·kg⁻¹)	3.07	1.17	1.27	1.67	1.57	0.87	0.97	1.27	0.77	0.87	0.77	3.07	1.32	0.65	0.49
SBE (cmol·kg⁻¹)	27.31	22.29	20.56	26.13	25.54	19.29	22.7	17.47	14.62	17.22	14.62	27.31	21.31	4.22	0.18
CEC (cmol·kg⁻¹)	71.44	42.72	39.52	33.28	39.52	36.16	25.4	38.24	28.64	37.6	25.44	71.44	38.15	12.39	0.32
P (mg/kg)	8.52	6.78	5.97	7.15	7.71	9.95	7.9	12.5	8.89	7.34	4.54	12.5	7.93	2.09	0.26
Ca/Mg	2.11	1.39	1.41	2.6	2.32	2.45	2.06	3.1	2.64	2.16	1.39	3.26	2.32	0.59	0.25
Mg/K	1.48	1.05	0.97	0.34	0.57	3.81	3.94	0.41	4.95	5.36	0.34	5.36	2.28	1.99	0.82
V (%)	38.22	52.19	52.03	78.51	64.63	53.35	89.3	45.67	51.04	45.8	38.22	89.3	57.07	15.87	0.26
ISS (%)	11.87	7.11	11.91	9.97	8.98	9.5	2.66	12.92	14.84	17.59	2.66	17.6	10.48	4.02	0.38
IB (%)	−2.8	−6.27	−4.89	−2.9	−7.09	−5.03	31.1	−3.23	−2.76	−2.18	−7.09	31.1	−0.61	11.25	−17.6
IF	1.41	1.7	3.35	0.93	2.89	2.05	2.77	2.21	2.36	2.07	0.93	3.35	2.17	0.72	0.31
BD (g/cm³)	0.79	1.45	1.94	1.74	2.11	1.88	1.68	1.31	1.56	1.5	0.79	2.11	1.59	0.37	0.22

Min: minimum; Max: maximum; SD: standard deviation; CV: coefficient of variation; SBE: sum of exchangeable bases; IF: Forestier index; ISS: soil aggregate stability index; IB: soil sealing index.