Table 1. Average meteorological conditions at the study site on experimental days during the harmattan, hot-dry and rainy seasons.
| Meteorological Parameter | Season |
||
|---|---|---|---|
| Harmattan (January) | Hot-dry (April) | Rainy (August) | |
| Wind speed (km/day)* | 240.5 ± 31.8a | 151.5 ± 24.9b | 122.8 ± 21.9b |
| Wind direction* | North-east & south-east | South-east, south-west & north-west | South-west |
| Rainfall (mm)* | 0.0 ± 0.0 | 0.0 ± 0.0 | 10.3 ± 17.8 |
| Dry-bulb temperature (°C) | 23.3 ± 6.3a | 33.2 ± 3.9b | 25.6 ± 2.8c |
| Relative humidity (%) | 16.5 ± 4.4a | 34.5 ± 19.9b | 88.4 ± 5.7c |
| Heat index (°C) | 21.6 ± 6.1a | 33.5 ± 4.4b | 27.7 ± 6.2c |
*Data collated from the Meteorological Section, Institute for Agricultural Research, Ahmadu Bello University, Zaria, located 2 km from the experimental site. Values are means ± standard deviation. Means (±SD) with different superscript letters (a, b and/or c) are significantly different (P<0.05).