Table 1.
Meteorological conditions during the 2012 and 2013 soybean growing seasons (planting to harvest) in Champaign, IL, USA.
| Year | Row space (m) | Planting date | Emergence date | Harvest date | Precipitationa (mm) | Tmaxa(°C) | Tmina(°C) | Tmeana (°C) | Solar radiationa (MJ m-2) |
|---|---|---|---|---|---|---|---|---|---|
| 2012 | 0.38 | 16 May | 25 May | 17 Oct | 517† | 28.4 | 14.9 | 21.4 | 3,337 |
| 2013 | 0.38 | 7 Jun | 17 Jun | 16 Oct | 271 | 28.2 | 15.7 | 21.6 | 2,396 |
| 2013 | 0.19 | 8 Jun | 21 Jun | 16 Oct | 271 | 28.3 | 15.7 | 21.6 | 2,380 |
Total precipitation, average maximum (Tmax), minimum (Tmin), and mean temperature (Tmean), and total available solar radiation over each growing season (planting to harvest) are indicated along with planting, emergence, and harvest dates for each experiment. aData from the Illinois Climate Network (http://www.isws.illinois.edu/warm/datatype.asp) were used to find mean temperatures and sums of precipitation and solar radiation from each growing season. †Precipitation (481 mm) + two irrigations of 18 mm each during mid-July.