Research Article
Effect of Irrigation and Preplant Nitrogen Fertilizer Source on Maize in the Southern Great Plains
Table 5
Irrigated and rain-fed treatment means for grain yield, N use efficiency (NUE), and water use efficiency (WUE).
| | Source | Grain yield | NUE | WUE | | kg ha−1 | % | kg ha−1 mm−1 |
| | STWa 2012 | | | | | Irrigated | 8598 | 29.0 | — | | Rain-fed | 4017 | 6.4 | — | | value | 0.0150 | 0.2258 | — | | LCBa 2012 | | | | | Irrigated | 6047 | 21.4 | — | | Rain-fed | 4835 | 19.8 | — | | value | 0.0118 | 0.9156 | — | | STW 2013 | | | | | Irrigated | 9120 | 31.1 | 15.6 | | Rain-fed | 2361 | 6.2 | 4.4 | | value | 0.0034 | 0.2243 | 0.0037 | | LCB 2013 | | | | | Irrigated | 8662 | 43.2 | 10.8 | | Rain-fed | 4022 | 25.0 | 5.3 | | value | 0.0440 | 0.0415 | 0.0498 |
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STW: Stillwater, OK; LCB: Lake Carl Blackwell, OK.
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