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The fitted regression between planting densities (x) and grain yield (y)
| N rates | Fitted equations | R 2 | p |
|---|---|---|---|
| N0 | y = 8107x + 3153.6 | 0.9101 | 0.06309 |
| N1 | y = 8881x + 4056.9 | 0.8804 | 0.17204 |
| N2 | y = 13119x + 2946.8 | 0.9178 | 9.56E−04 |
| N3 | y = 10260x + 3294.9 | 0.9387 | 0.03314 |
N represents nitrogen
