Assessing Soil Nutrients Variability and Adequacy for the Cultivation of Maize, Cassava, and Sorghum in Selected Agroecological Zones of Cameroon

Table 4

Summary statistics of soil chemical properties within Centre region (n = 18).

Soil properties	Max	Min	Mean	SD	CV	Kurtosis	Skewness	Shapiro–Wilk ( value)
TEC (100 meq/100 g)	12.77	4.72	9.00	2.23	24.71	−0.76	−0.15	0.863
pH	6.0	3.9	4.85	0.58	12.03	−0.46	0.49	0.453
Organic matter (%)	8.16	1.99	3.48	2.05	58.80	1.61	1.68	0.000
Estimated N release (lbs acre^−1)	116	60	78.17	18.93	24.22	−0.026	1.07	0.003
S (ppm)	23	4.00	10.11	5.78	57.16	0.11	1.09	0.009
P (mg kg^−1)	8	<1.00	—	—	—	—	—	—
Ca (mg kg^−1)	1204	280	601.67	276.92	46.03	−0.29	0.91	0.033
Mg (mg kg^−1)	219	58	109.83	47.03	42.82	0.59	1.13	0.24
K (mg kg^−1)	122	15	59.06	28.82	48.80	−0.29	0.56	0.668
Na (mg kg^−1)	16	9	13.17	2.46	18.65	−1.13	−0.30	0.05
Al (mg kg^−1)	1223	457	756.22	200.07	26.46	0.44	0.81	0.464
Ca saturation (%)	59.37	17.48	33.32	12.01	36.05	−0.08	0.79	0.205
Mg saturation (%)	18.69	4.88	10.36	4.02	38.79	−0.29	0.93	0.018
K saturation (%)	3.64	0.59	1.76	0.94	53.59	−0.46	0.74	0.112
Na saturation (%)	1.47	0.35	0.69	0.28	40.48	2.40	1.42	0.032
H (%)	66.00	15.00	46.17	14.45	31.29	−0.46	−0.07	0.087
B (mg kg^−1)	0.33	<0.2	—	—	—	—	—	—
Fe (mg kg^−1)	197	35.00	109.94	36.89	33.55	1.14	0.29	0.876
Mn (mg kg^−1)	234	1.00	115.83	72.73	62.79	−0.75	−0.13	0.285
Cu (mg kg^−1)	2.37	1.06	1.73	0.35	20.27	−0.22	−0.03	0.947
Zn (mg kg^−1)	2.63	<0.4	—	—	—	—	—	—

Min: minimum; Max: maximum; SD: standard deviation; CV: coefficient of variation; values with “<” indicate the limit of quantification.