Table 1 Selected topsoil (depth 0–15 cm) properties of the study sites
Sampling site | pH (water) | Organic C (%) | Total N (%) | Extractable P (mg/kg) | Exchangeable Ca (cmol /kg) | Exchangeable Mg (cmol/kg) | Exchangeable K (cmol/kg) |
|---|---|---|---|---|---|---|---|
Nyanza | |||||||
Kisii | 5.33 | 1.40 | 0.13 | 4.36 | 5.09 | 1.95 | 0.45 |
Migori | 5.60 | 1.50 | 0.14 | 3.07 | 1.90 | 0.33 | 0.40 |
Bondo | 5.87 | 3.67 | 0.25 | 3.00 | 25.99 | 12.53 | 0.82 |
Rachuonyo | 5.57 | 1.40 | 0.11 | 3.91 | 4.74 | 2.26 | 0.48 |
Western Kenya | |||||||
Bungoma | 5.56 | 1.50 | 0.18 | 2.39 | 6.23 | 1.80 | 0.15 |
Butere Mumias | 5.92 | 1.40 | 0.14 | 1.67 | 3.71 | 1.30 | 0.23 |
Teso | 6.36 | 1.50 | 0.14 | 2.05 | 5.94 | 1.90 | 0.23 |
Siaya | 5.04 | 3.50 | 0.30 | 3.67 | 20.00 | 9.80 | 0.95 |
Rift Valley | |||||||
Nakuru | 6.03 | 2.69 | 0.28 | 4.66 | 10.03 | 3.27 | 1.28 |
Uasin Gishu | 5.63 | 1.40 | 0.10 | 7.08 | 3.68 | 1.55 | 0.55 |
Central Kenya | |||||||
Meru South | 5.68 | 2.60 | 0.23 | 8.50 | 6.98 | 2.54 | 0.88 |
Mitunguu | 5.58 | 1.90 | 0.25 | 7.31 | 5.45 | 2.02 | 0.42 |
Coast | |||||||
Kilifi | 6.93 | 0.98 | 0.08 | 7.00 | 4.04 | 1.71 | 0.55 |