|
Parameters
|
Mansa
|
Kabangwe
|
Manure
|
Requirementb
|
|---|
|
Particle size (%)
|
|
Sand
|
77
|
54
| | |
|
Silt
|
7
|
20
| | |
|
Clay
|
16
|
26
| | |
|
Textural class
|
Sandy loam
|
Sandy clay loam
| | |
|
pH (water)
|
4.9
|
5.28
|
7.48
|
3.5–4.5 (in H2O 1:1)
|
|
OC (%)
|
1.07
|
1.19
|
26
|
1–2 (Walkley and Black)
|
|
TN (%)
|
0.05
|
0.06
|
3.6
| |
|
C/N
|
22.34
|
19.39
|
7.86
| |
|
AP (mg kg−1)
|
20.51
|
3.78
|
1.32a
|
2–4
|
|
CEC (cmol+ kg−1)
|
2.97
|
4.56
|
22.01
| |
|
Exchangeable bases (cmol
+
kg
−1
)
|
|
Ca
|
1.22
|
2.57
|
8.6a
|
0.25–1
|
|
Mg
|
0.29
|
1.2
|
0.62a
|
0.2–0.4
|
|
K
|
0.12
|
0.09
|
1.99a
|
0.1–0.15
|
|
Na
|
0.044
|
0.045
|
7.75
| |
|
Total exchangeable bases
|
1.674
|
3.905
| | |
|
Micronutrients (mg kg−1)
|
|
Zn
|
0.74
|
0.41
|
142.8
|
0.5–1
|
|
Cu
|
6.18
|
1.31
|
10.39
|
0.1–0.3
|
|
Mn
|
57
|
107
|
182
|
5–10
|
|
Fe
|
78
|
59
|
95
|
1–10
|
- aResults are expressed in percent (%)
- bLow level cassava requirement as stated in Howeler (2014)
