Table 1.
Geographical and soil descriptions of the study environments.
| Location | Location (environment) code | Coordinates | Altitude (masl) | Soil parameters |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Textural class | pH (H2O) | OC (%) | TN (%) | Av. P (meq/100 g) | Exchangeable bases (meq/100 g) |
||||||||
| Ca | Mg | K | N | ||||||||||
| Gairo | E1 | E036o54′787″ | S06o08′156″ | 1310 | Sandy clay loam | 5.9 | 0.81 | 0.08 | 5.9 | 4.1 | 1.9 | 0.66 | 0.20 |
| SRI | E2 | E038o58′315″ | S06o46′701″ | 169 | Clay | 6.7 | 0.71 | 0.07 | 3.9 | 6.2 | 2.1 | 0.48 | 0.26 |
| KATRIN | E3 | E036o39′945″ | S08o03′612″ | 288 | Sandy loam | 6.0 | 1.15 | 0.06 | 6.0 | 9.9 | 2.1 | 0.53 | 0.25 |
| SUA | E4 | E037o38′756″ | S06o50′252″ | 518 | Clay | 5.3 | 2.10 | 0.11 | 5.3 | 5.1 | 2.5 | 0.95 | 0.30 |
| Chambezi | E5 | E038o28′59″ | S06o33′302″ | 47 | Loamy sand | 6.4 | 0.39 | 0.05 | 6.4 | 2.7 | 0.7 | 0.24 | 0.21 |
| Mkuranga | E6 | E039o11′689″ | S06o08′306″ | 119 | Sandy loam | 6.4 | 0.37 | 0.06 | 6.4 | 2.0 | 0.4 | 0.24 | 0.17 |
Masl = metres above sea level; meq 100 g−1 = milli-equivalent per 100 g of soil; Av. P = Available phosphorus; OC = organic carbon; TN = total nitrogen; Ca = calcium; Mg = Magnesium; K = potassium; Na = Sodium; KATRIN = Kilombero Agricultural Training and Research Institute; SRI = Sugarcane Research Institute; SUA = Sokoine University of Agriculture.