Authors: Charles R. O'Dell Extension Horticulturist, Department of Horticulture, Virginia Tech; Jerry Williams, Teaching Hortculturist, Department of Horticulture, Virginia Tech
Publication Number 438-018, Posted March 2000
TABLE 2 - Recommended Sprinkler Irrigation Starting Temperature for Various Critical Temperatures and Dew Points
| Critical Temperature (Wet Bulb) |
Dew Point |
Suggest Starting (Air) Temperatures | |||
|---|---|---|---|---|---|
| °F | °C | °F | °C | °F | °C |
| 32 | 0 | 32 | 0 | 34 | 1.1 |
| 32 | 0 | 31 | -0.6 | 35 | 1.6 |
| 32 | 0 | 29 | -1.7 | 36 | 2.2 |
| 32 | 0 | 28 | -2.2 | 37 | 2.8 |
| 32 | 0 | 26 | -3.3 | 38 | 3.3 |
| 32 | 0 | 24 | -4.4 | 40 | 4.4 |
| 32 | 0 | 22 | -5.6 | 41 | 5.0 |
| 32 | 0 | 20 | -6.7 | 42 | 5.6 |
| 32 | 0 | 18 | -7.9 | 43 | 6.1 |
| 30 | -1.1 | 30 | -1.1 | 32 | 0.0 |
| 30 | -1.1 | 29 | -1.7 | 33 | 0.6 |
| 30 | -1.1 | 27 | -2.8 | 34 | 1.1 |
| 30 | -1.1 | 25 | -3.8 | 35 | 1.6 |
| 30 | -1.1 | 24 | -4.4 | 37 | 2.8 |
| 30 | -1.1 | 22 | -5.6 | 38 | 3.3 |
| 30 | -1.1 | 20 | -6.7 | 39 | 3.9 |
| 30 | -1.1 | 17 | -8.3 | 40 | 4.4 |
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