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

Table 2

Summary statistics of soil chemical properties within Far North region (n = 62).

Soil properties	Max	Min	Mean	SD	CV (%)	Kurtosis	Skewness	Shapiro–Wilk ( value)
TEC (100 meq/100 g)	35.4	3.80	16.09	7.79	48.41	−0.04	0.78	0.002
pH	8.9	5.10	6.50	0.84	12.95	0.49	0.63	0.049
Organic matter (%)	1.96	0.26	0.95	0.40	41.70	0.30	0.83	0.005
Estimated N release (lbs acre^−1)	59	10	35.26	11.59	32.87	−0.63	0.11	0.38
S (ppm)	11	1	5.71	1.89	33.17	0.94	0.28	0.011
P (mg kg^−1)	120	<1	—	—	—	—	—	—
Ca (mg kg^−1)	4251	291	1990.71	1039.62	52.22	−0.56	0.54	0.013
Mg (mg kg^−1)	1003	72	355.03	221.59	62.41	0.83	1.13	0.000
K(mg kg^−1)	600	66	159.34	83.66	52.50	11.73	2.73	0.000
Na (mg kg^−1)	695	12	74.19	118.19	159.30	19.93	4.28	0.000
Al (mg kg^−1)	825	193	470.24	149.20	31.73	−0.23	0.46	0.116
Ca saturation (%)	80.20	35.25	60.78	11.09	18.24	−0.32	−0.74	0.001
Mg saturation (%)	26.84	10.43	17.56	3.65	20.79	−0.09	0.34	0.678
K saturation (%)	9.19	0.92	2.92	1.68	57.47	4.07	1.96	0.000
Na saturation (%)	25.74	0.50	2.02	3.54	174.78	35.07	5.60	0.000
H (%)	42	0.00	11.68	12.25	104.86	−0.04	1.05	0.000
B (mg kg^−1)	0.73	<0.2	—	—	—	—	—	—
Fe (mg kg^−1)	177	54	102.34	30.97	30.26	0.265	0.74	0.002
Mn (mg kg^−1)	191	29	84.69	38.89	45.91	−0.319	0.60	0.009
Cu (mg kg^−1)	2.83	0.41	1.25	0.58	46.19	−0.068	0.72	0.007
Zn (mg kg^−1)	3.46	<0.4	—	—	—	—	—	—

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