The model is based on 33 representative experiments and has an R2 value of 0.45.
|
Reference |
Country |
Crop |
CEC |
K fert. |
Rainfall |
K leach. |
|
cmol/kg |
kg K/ha |
mm |
kg K/ha |
|||
|
Hafner et al., 1992 |
Niger |
Millet |
1.3 |
0 |
699 |
12 |
|
Hafner et al., 1992 |
Niger |
Millet |
1.3 |
25 |
699 |
10 |
|
Van der Eijk, 1995 |
Tanzania |
Bananas/beans |
4.6 |
0 |
2 000 |
39 |
|
Van der Eijk, 1995 |
Tanzania |
Bananas |
4.6 |
273 |
724 |
74 |
|
Wong et al., 1992 |
Nigeria |
Maize |
2.4 |
67 |
2 420 |
23 |
|
Wong et al., 1992 |
Nigeria |
Rice (upland) |
2.4 |
42 |
2 420 |
9 |
|
Wong et al., 1992 |
Nigeria |
Bare soil |
2.4 |
67 |
2 420 |
29 |
|
Wong et al., 1992 |
Nigeria |
Bare soil |
2.4 |
42 |
2 420 |
20 |
|
Imbach et al., 1989 |
Costa Rica |
Cacao/poro |
- |
27 |
1 923 |
1 |
|
Imbach et al., 1989 |
Costa Rica |
Cacao/laurel |
- |
27 |
1 923 |
1 |
|
Gigou, 1986 |
Cameroon |
Sorghum/cotton |
7.4 |
62 |
737 |
2 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Maize |
8.0 |
29 |
633 |
1 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Maize |
8.0 |
58 |
633 |
1 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Cotton |
8.0 |
37 |
532 |
1 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Cotton |
8.0 |
75 |
532 |
1 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Maize |
8.0 |
29 |
633 |
2 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Maize |
8.0 |
58 |
633 |
2 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Cotton |
8.0 |
37 |
532 |
2 |
|
Chabalier, 1984 |
Côte d’Ivoire |
Cotton |
8.0 |
75 |
532 |
1 |
|
Roose, 1981 |
Côte d’Ivoire |
Maize |
8.0 |
39 |
2 100 |
3 |
|
Roose, 1981 |
Côte d’Ivoire |
Rubber |
8.1 |
0 |
2 100 |
63 |
|
Roose, 1981 |
Côte d’Ivoire |
Tree savannah (burned) |
6.1 |
0 |
1 350 |
21 |
|
Roose, 1981 |
Côte d’Ivoire |
Maize |
6.1 |
70 |
1 350 |
1 |
|
Roose, 1981 |
Burkina Faso |
Fallow |
2.5 |
0 |
860 |
4 |
|
Roose, 1981 |
Burkina Faso |
Sorghum |
2.5 |
50 |
860 |
1 |
|
Roose, 1981 |
Burkina Faso |
Tree savannah |
3.9 |
0 |
860 |
1 |
|
Cisse, 1986 |
Senegal |
Groundnut |
5.2 |
34 |
211 |
3 |
|
Cisse, 1986 |
Senegal |
Groundnut |
6.3 |
34 |
211 |
1 |
|
Cisse, 1986 |
Senegal |
Groundnut |
5.2 |
34 |
279 |
1 |
|
Cisse, 1986 |
Senegal |
Groundnut |
5.2 |
34 |
347 |
2 |
|
Cisse, 1986 |
Senegal |
Millet |
5.2 |
9 |
347 |
1 |
|
Cisse, 1986 |
Senegal |
Millet |
6.3 |
9 |
347 |
0 |
|
Charreau, 1972 |
Senegal |
Rotation |
- |
0 |
660 |
7 |
