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

Table 3

Summary statistics of soil chemical properties within North region (n = 46).

Soil properties	Max	Min	Mean	SD	CV	Kurtosis	Skewness	Shapiro–Wilk ( value)
TEC (100 meq/100 g)	35.08	2.08	7.49	6.01	80.25	9.86	2.85	0.000
pH	7.5	4.7	5.80	0.66	11.39	0.16	0.83	0.015
Organic matter (%)	1.85	0.38	0.78	0.32	41.59	1.19	1.07	0.001
Estimated N release (lbs acre^−1)	57	15	29.96	10.67	36.03	1.19	0.48	0.005
S (ppm)	7	<1.00	—	—	—	—	—	—
P (mg kg^−1)	111	2.00	12.11	18.55	153.16	21.15	4.50	0.000
Ca (mg kg^−1)	4232	213	814.46	751.03	90.67	9.70	2.85	0.000
Mg (mg kg^−1)	1140	25	136.02	190.29	139.90	18.07	3.99	0.000
K(mg kg^−1)	183	30	72.78	30.25	41.57	2.82	1.46	0.000
Na (mg kg^−1)	166	8	25.63	27.63	107.80	14.98	3.51	0.000
Al (mg kg^−1)	698	202	379.07	116.34	30.34	0.17	0.76	0.048
Ca saturation (%)	74.59	28.77	52.39	11.68	22.30	−0.87	−0.08	0.476
Mg saturation (%)	27.08	7.52	12.94	4.46	34.46	1.65	1.35	0.000
K saturation (%)	5.71	1.23	3.03	1.13	37.24	−0.35	0.46	0.233
Na saturation (%)	5.94	0.63	1.54	0.92	59.79	10.92	2.72	0.000
H (%)	51	0.00	24.11	14.33	58.61	−0.89	−0.13	0.141
B (mg kg^−1)	0.80	<0.2	—	—	—	—	—	—
Fe (mg kg^−1)	297	41	104.13	59.94	56.76	2.06	1.47	0.000
Mn (mg kg^−1)	252	16	103.26	50.88	49.27	0.98	0.99	0.013
Cu (mg kg^−1)	3.01	0.24	1.02	0.75	73.10	0.68	1.29	0.000
Zn (mg kg^−1)	5.36	<0.4	—	—	—	—	—	—

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