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N rate, grain yield and N partial factor productivity (PFPN) in famer’s field in Jiangsu by the farmer survey.
| Location | N rate (kg ha−1) | Grain yield (kg kg−1) | PFPN (kg kg−1) |
|---|---|---|---|
| South (n = 157) | 310.1 b | 8537.2 a | 27.5 a |
| Central (n = 190) | 353.5 a | 8041.6 ab | 22.7 b |
| North (n = 389) | 346.5 a | 7816.6 b | 22.6 b |
