Spatial Distribution and Evolution of pH as a Function of Cation Exchange Capacity, Sum of Exchangeable Bases, and Organic Matter and Aluminum in the Soils of Foumban
Table 1
Summary statistics of the original Foumban soil variables.
Stats
Number of values
Minimum
Maximum
Range
Mean
Standard deviation
Coefficient of variation
Skew
Kurtosis
%S
90
23.50
75.00
51.50
52.99
11.83
0.22
−0.32
−0.43
%L
90
5.50
37.57
32.07
18.50
6.38
0.34
1.02
0.57
%A
90
9.50
61.50
52.00
28.64
11.05
0.39
0.66
0.40
pH
90
3.80
6.40
2.60
5.01
0.58
0.12
0.14
−0.51
OM (%)
90
0.62
11.09
10.46
5.21
2.17
0.42
0.22
0.11
SBE (méq/100 g)
90
0.57
31.87
31.30
10.65
5.89
0.55
1.28
1.86
CEC (méq/100 g)
90
2.46
39.68
37.22
20.45
6.84
0.33
0.28
1.16
(Ca + Mg)/K
90
0.37
1079.39
1079.02
57.91
159.51
2.75
5.36
29.31
%S: percentage of sands; %A: percentage of clays; %L: percentage of silts; SBE: sum of exchangeable bases. CEC: cation exchange capacity; Ca: calcium; Mg: magnesium; K: potassium; OM: organic matter.
