Research Article
Response of Soybean to Early-Season Planting Dates along the Upper Texas Gulf Coast
Table 4
Plants counts of soybean cultivars at different planting dates.
| | Plant date | 2006 | 2007 | 2008 | | Maturity group | | 5.1 | 5.4 | 4.8 | 5.1 | 5.9 | 4.9 | 5.0 | 5.1 | 5.4 |
| | | Plants/m | | Feb. 20 | 23.9 | 28.9 | 31.5 | 25.9 | 29.8 | 21.3 | 17.9 | 19.7 | 20.4 | | Mar. 15 | 21.3 | 23.0 | 33.1 | 28.5 | 31.8 | 24.3 | 27.7 | 27.3 | 23.9 | | Apr. 5 | 18.4 | 22.3 | 34.4 | 33.1 | 33.1 | 25.6 | 26.4 | 22.6 | 17.9 | | Apr. 25 | 20.2 | 21.6 | 33.8 | 28.9 | 32.5 | 27.7 | 28.1 | 26.0 | 19.2 | | LSD (0.05) | 3.9 | 2.3 | 6.9 |
| | Plant date | 2009 | 2010 | | Maturity group | | 4.9 | 5.0 | 5.1 | 5.4 | 5.9 | 4.8 | 4.9 | 5.0 | 5.1 | 5.4 | 5.9 |
| | | Plants/m | | Feb. 20 | 15.5 | 27.2 | 24.9 | 21.6 | 28.5 | — | — | — | — | — | — | | Mar. 15 | 23.9 | 30.8 | 24.6 | 27.2 | 31.8 | 22.6 | 18.7 | 20.0 | 23.3 | 18.4 | 16.1 | | Apr. 5 | 22.8 | 28.4 | 24.3 | 27.5 | 30.8 | 13.4 | 17.7 | 11.5 | 28.8 | 19.0 | 20.7 | | Apr. 25 | 23.1 | 29.1 | 23.8 | 26.8 | 31.5 | — | — | — | — | — | — | | LSD (0.05) | 2.3 | 3.6 |
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