Table 1.
CLIMEX parameter values used for modelling the distribution of maize (Zea mays L.).
| Index | Parameter | Acronym | Value |
|---|---|---|---|
| Temperature | Lower temperature limit (°C) | DV0 | 10 |
| Lower optimal temperature (°C) | DV1 | 18 | |
| Upper optimal temperature (°C) | DV2 | 30 | |
| Upper temperature limit (°C) | DV3 | 35 | |
| Moisture | Limiting low soil moisture | SM0 | 0.1 |
| Lower optimal soil moisture | SM1 | 0.7 | |
| Upper optimal soil moisture | SM2 | 0.9 | |
| Limiting high soil moisture | SM3 | 1.3 | |
| Stresses | Cold stress temperature threshold (°C) | TTCS | 7 |
| Cold stress temperature rate (week−1) | THCS | −0.00007 | |
| Heat stress temperature threshold (°C) | TTHS | 40 | |
| Heat stress accumulation rate (week−1) | THHS | 0.01 | |
| Dry stress threshold | SMDS | 0.1 | |
| Dry stress rate (week−1) | HDS | −0.009 | |
| Wet stress threshold | SMWS | 1.3 | |
| Wet stress rate (week−1) | HWS | 0.001 |
*Moisture value units are dimensionless indices in proportions of soil moisture holding capacity.