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

Table 9

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

	TEC	pH	OM	ENR	S	P	Ca	Mg	K	Na	B	Fe	Mn	Cu	Zn	Al
TEC	1
pH	0.253	1
OM	0.769	0.244	1
ENR	0.773	0.246	0.999	1
S	−0.239	−0.052	0.024	0.023	1
P	−0.161	0.064	−0.364	−0.368	−0.311	1
Ca	0.918	0.561	0.722	0.725	−0.239	−0.096	1
Mg	0.886	0.547	0.711	0.712	−0.194	−0.110	0.945	1
K	0.660	0.307	0.642	0.641	−0.129	−0.070	0.647	0.676	1
Na	0.574	0.433	0.585	0.588	0.116	−0.072	0.612	0.650	0.503	1
B	0.008	0.082	0.152	0.155	−0.100	−0.032	0.003	0.003	−0.017	0.063	1
Fe	0.600	0.217	0.617	0.619	−0.054	−0.189	0.563	0.531	0.526	0.643	0.050	1
Mn	0.012	0.427	−0.047	−0.044	0.044	0.106	0.157	0.188	0.124	−0.171	0.129	−0.271	1
Cu	0.621	0.394	0.603	0.597	0.039	−0.061	0.653	0.673	0.469	0.815	0.041	0.772	−0.154	1
Zn	−0.133	0.148	−0.110	−0.126	0.021	0.344	−0.047	−0.021	−0.040	−0.046	0.010	−0.026	0.033	0.145	1
Al	0.491	−0.043	0.630	0.631	0.160	−0.330	0.405	0.461	0.309	0.524	−0.017	0.362	−0.220	0.550	−0.170	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 = 46; S (n = 43); B (n = 29); Zn (n = 31); 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).