AGROECOLOGICAL ZONES

SUDAN SAVANNAH

NORTHERN GUINEA SAVANNAH

SOUTHERN

GUINEA SAVANNAH

Soil Properties

Min

Max

Mean ± SD

Min

Max

Mean ± SD

Min

Max

Mean ± SD

pH level

5.4

8.4

6.67 ± 1.27

5

6

5.63 ± 0.45

5.1

7.8

6.33 ± 1.11

Available P (mg/l)

3

4.4

3.8 ± 0.59

4

9.4

6 ± 2.42

3

49.8

18.8 ± 21.8

Available K (mg/l)

18.2

54.4

40.8 ± 16.1

58

90.6

71 ± 14.1

28.2

184

87 ± 67.1

Available Mg (mg/l)

47.4

68

57.4 ± 8.42

67.2

124

83.1 ± 28.9

50.9

123

95.3 ± 31.72

Sand (2.00 - 0.063 mm)

85

87

86 ± 0.82

47

68

54.3 ± 9.7

78

81

79.3 ± 1.25

Silt (0.063 - 0.002 mm)

9

13

11 ± 1.63

24

43

36.3 ± 8.73

13

15

14 ± 0.82

Clay (<0.002 mm)

2

5

3 ± 1.41

8

10

9.33 ± 0.94

4

8

6.67 ± 1.89

Available Ca (mg/l)

249

430

328 ± 75.4

200

727

451 ± 215

572

909

773.3 ± 145.2

Organic Matter (w/w)

0.5

0.7

0.70 ± 0.16

1.6

2.2

1.8 ± 0.28

1

1.9

1.53 ± 0.39