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Table 2 Maize crop log for the T1 treatments including planting day of year (DOY) and elapsed days (DAP) and growing degree days (GDD, 30 °C maximum, 10 °C base) between planting and critical growth stages

From: Water productivity of maize in the US high plains

Year 2008 2009 2010 2011
Planting (DOY) 133 131 131 123
Growth stage, event DAP GDD DAP GDD DAP GDD DAP GDD
Emergence 20 155 11 91 13 68 22a 100
V7 51 440 45 337 48 396 56 399
VT/R1 86 847 84 745 83 792 90 819
R4 120 1128 117 1067 116a 1145 120 1171
R6 155 1346 143a 1247 141a 1368 142a 1341
Senescence 155b 1346 145b 1254 145a 1398 154 1454
Harvest 178 1446 185 1353 161 1490 175 1556
  1. aEstimated DAP and GDD
  2. bKilling frost