Table 2.
Selected long-term and seasonal environmental variables used to describe the planting sites
| Reciprocal garden planting sites | Ave temp, °C (max, min) | Elevation (m) | MAP, since 1961 (cm) | 2010 2009 ppt (cm) | Growing season ppt (April 1 –August 31, 2010) | Ppt of driest year (cm, year) | GDD ave | GDD 2010 | PET (cm) | Aridity index (PET-ppt) |
|---|---|---|---|---|---|---|---|---|---|---|
| Colby, KS | 10.5 (18.4, 2.6) | 972 | 50.47 (±11.77) | 47.72 | 39.21 | 28.37 (1967) | 3167 | 3461 | 144 | 97 |
| KSU Ag. Res. Center | 67.81 | |||||||||
| Thomas County | ||||||||||
| 39°23′N, | ||||||||||
| 101°04′W | ||||||||||
| Hays, KS | 12 (19.3, 4.7) | 603 | 58.22 (±13.13) | 58.29 | 48.84 | 36.27 (1988) | 3799 | 4193 | 139 | 81 |
| KSU Ag. Res. Center | 55.12 | |||||||||
| Ellis County | ||||||||||
| 38°51′N, | ||||||||||
| 99°19′W | ||||||||||
| Manhattan, KS | 13 (19.6, 6.4) | 315 | 87.15 (±20.04) | 84.68 | 67.23 | 39.16 (1966) | 4156 | 4105 | 127 | 41 |
| USDA Plant Material Center | 98.27 | |||||||||
| Riley County | ||||||||||
| 39°08′N, | ||||||||||
| 96°38′W | ||||||||||
| Carbondale, Illinois | 13.3 (19.5, 7.1) | 127 | 116.73 (±24.76) | 80.31 | 47.01 | 67.38 (1963) | 4087 | 4474 | 99 | −18 |
| SIU Agronomy Center | 154.58 | |||||||||
| Jackson County | ||||||||||
| 37°73′N, | ||||||||||
| 89°22′W | ||||||||||
Ppt, precipitation; PET, potential evapotranspiration; MAP, mean annual precipitation.
Growing degree days was calculated as GDD = [(ATmax + Tmin)/2]−50; if GDD is <0, set to 0.