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

Table 8

Spearman rank order correlations of measured chemical properties for soil samples in the Far North region.

	TEC	pH	OM	ENR	S	P	Ca	Mg	K	Na	B	Fe	Mn	Cu	Zn	Al
TEC	1
pH	0.213	1
OM	0.849	0.234	1
ENR	0.848	0.234	1.000	1
S	0.074	0.033	0.063	0.066	1
P	−0.172	0.025	−0.089	−0.092	0.087	1
Ca	0.950	0.431	0.864	0.864	0.035	−0.105	1
Mg	0.943	0.364	0.869	0.868	0.029	−0.209	0.939	1
K	0.472	0.248	0.562	0.559	0.102	0.164	0.520	0.574	1
Na	0.731	0.357	0.534	0.535	0.185	−0.345	0.706	0.763	0.267	1
B	−0.140	−0.048	0.129	−0.132	0.026	0.174	−0.108	−0.183	−0.141	−0.027	1
Fe	0.369	−0.188	0.457	0.457	0.061	0.501	0.347	0.329	0.306	0.094	0.160	1
Mn	0.319	0.629	0.389	0.389	0.180	0.043	0.437	0.347	0.185	0.245	0.208	0.106	1
Cu	0.906	0.289	0.821	0.820	0.067	0.039	0.912	0.890	0.496	0.700	−0.070	0.498	0.266	1
Zn	−0.348	0.309	−0.150	−0.147	−0.224	0.625	−0.169	−0.278	0.075	−0.431	−0.009	0.204	0.157	−0.164	1
Al	0.695	−0.138	0.561	0.559	0.115	−0.395	0.577	0.624	0.337	0.563	−0.062	0.186	−0.035	0.527	−0.573	1

Correlation is significant at the 0.01 level (2-tailed); correlation is significant at the 0.05 level (2-tailed); total number of soil samples n = 62; P (n = 61); B (n = 47); Zn (n = 47); OM (%); TEC (meq/100 g); ENR (lbs acre⁻¹); S (ppm); P (mg kg⁻¹); Ca (mg kg⁻¹); Mg (mg kg⁻¹); K (mg kg⁻¹); Na (mg kg⁻¹); B (mg kg⁻¹); Fe (mg kg⁻¹); Mn (mg kg⁻¹); Cu (mg kg⁻¹); Zn (mg kg⁻¹); Al (mg kg⁻¹).