| Country | Scientists | Extension workers | ||
| Know fertiliser optimisation tool % | Used fertiliser optimisation tool % | Know fertiliser optimisation tool % | Used fertiliser optimisation tool % | |
| Ethiopia | 23 (7) | 22 (4) | 16(3) | 0(0) |
| Burkina Faso | 0 (0) | 0(0) | 0(0) | 0(0) |
| Ghana | 19 (6) | 0 (0) | 16 (3) | 0(0) |
| Kenya | 23 (7) | 6 (1) | 0(0) | 0(0) |
| Malawi | 10 (3) | 0(0) | 16 (3) | 0(0) |
| Mali | 10(3) | 0(0) | 0(0) | 0(0) |
| Mozambique | 6(2) | 6 (1) | 0(0) | 0(0) |
| Niger | 10(3) | 6 (1) | 16 (3) | 0(0) |
| Nigeria | 16(5) | 17 (3) | 0(0) | 0(0) |
| Rwanda | 6 (2) | 6 (1) | 0(0) | 0(0) |
| Tanzania | 19(6) | 6 (1) | 16 (3) | 0(0) |
| Uganda | 14(4) | 11 (2) | 16(3) | 0(0) |
| Zambia | 6(2) | 0(0) | 0(0) | 0(0) |