Assessing Soil Nutrients Variability and Adequacy for the Cultivation of Maize, Cassava, and Sorghum in Selected Agroecological Zones of Cameroon
Table 10
Spearman rank order correlations of measured chemical properties for soil samples in the Centre region.
TEC
pH
OM
ENR
S
P
Ca
Mg
K
Na
B
Fe
Mn
Cu
Zn
Al
TEC
1
pH
−0.047
1
OM
0.420
0.301
1
ENR
0.411
0.314
0.998
1
S
0.039
−0.831
−0.430
−0.438
1
P
−0.119
−0.545
−0.373
−0.387
0.806
1
Ca
0.622
0.713
0.455
0.456
−0.590
−0.425
1
Mg
0.455
0.702
0.389
0.377
−0.580
−0.480
0.876
1
K
0.108
−0.265
−0.057
−0.045
0.427
0.448
−0.188
−0.174
1
Na
−0.313
0.226
0.170
0.157
−0.197
0.080
−0.114
0.092
0.053
1
B
0.571
0.432
0.107
0.126
−0.500
−0.433
0.643
0.429
−0.107
−0.055
1
Fe
−0.003
−0.501
−0.438
−0.432
0.605
0.427
−0.387
−0.591
0.163
−0.438
0.000
1
Mn
−0.070
−0.156
−0.486
−0.469
0.311
0.247
−0.150
−0.389
−0.062
−0.435
0.000
0.661
1
Cu
0.203
−0.608
−0.547
−0.546∗
0.826
0.650
−0.275
−0.392
0.263
−0.337
−0.107
0.636
0.452
1
Zn
0.463
0.352
0.272
0.274
−0.157
−0.185
0.492
0.293
0.063
−0.365
0.739
0.203
0.396
0.038
1
Al
0.038
−0.163
0.418
0.408
0.118
0.171
−0.098
0.086
0.223
0.457
−0.286
−0.300
−0.720
−0.097
−0.640∗
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 = 18; P (n = 17); B (n = 7); Zn (n = 15); 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).