Table 1 Mean soil properties, fertilizer use and crop yield as influenced by topographic position in three districts of Wolaita Zone, Southern Ethiopia

Physical property

 Sand (%)

15.98

15.77

14.07

11.69

11.73

 Silt (%)

41.93

44.01

31.89

28.10

31.02

 Clay (%)

42.09

40.22

54.04

60.21

57.25

Textural class

Silty Clay

Silty Clay

Clay

Clay

Clay

 BD (gm cm⁻³)

1.12

1.05

1.17

1.20

1.24

Chemical property

 pH_H2O

6.15

6.07

6.11

6.08

6.08

 OC (%)

2.06

2.0

2.04

1.99

1.8

 TN (%)

0.13

0.13

0.14

0.15

0.15

 P (mg kg⁻¹)

15.25

13.32

9.92

11.03

4.74

 S (mg kg⁻¹)

10.54

11.88

10.73

11.15

10.98

 Ca (Cmol c kg⁻¹)

8.84

8.34

7.87

7.99

7.3

 K (Cmol c kg⁻¹)

1.33

1.15

1.33

1.3

1.03

 Mg (Cmol c kg⁻¹)

1.85

1.77

1.92

2.18

2.18

 TEB (Cmol c kg⁻¹)

12.83

12.11

11.89

12.19

11.34

 B (mg kg⁻¹)

0.61

0.52

0.56

0.53

0.46

 Cu (mg kg⁻¹)

0.65

0.52

0.58

0.54

0.31

 Fe (mg kg⁻¹)

142.3

182.9

122.3

118.9

120.2

 Mn (mg kg⁻¹)

133.6

109.9

153.9

150.4

121.4

 MnAI (mg kg⁻¹)

509.3

421.8

586.1

573.2

464.6

 Zn (mg kg⁻¹)

10.7

9.4

9.1

7.8

6.4

Fertilizer use

 DAP (Kg/ha)

35

32

35

33

31

 Urea (Kg/ha)

9.8

2.9

7.6

5.2

6.4

 FYM (t/ha)

1.0

1.5

0.9

0.6

0.4

Crop yield

 Maize (W/O) (t/ha)

0.6

0.6

0.6

0.5

0.2

 Maize (with) (t/ha)

2.3

2.2

2.1

2.0

1.3

 Haricot bean (W/O) (t/ha)

0.4

0.4

0.4

0.3

0.3

 Haricot bean (With) (t/ha)

1.2

1.2

1.2

1.0

1.1

 Sweet potato (W/O) (t/ha)

3.9

5.0

4.7

5.0

3.0

 Sweet potato (With) (t/ha)

9.7

10.3

11.1

12.7

6.0