Table 3. Maize grain yield (Mg ha-1) and N uptake (kg ha-1) as influenced by cultivar and levels of NPK in two years.
| Treatments | Grain N uptake | Grain yield |
|---|---|---|
| Year | ||
| 2012–13 | 114.85a | 7.62a |
| 2013–14 | 118.16a | 8.16a |
| Cultivar | ||
| P 3522 | 122.19a | 8.34a |
| P 3396 | 118.60ab | 7.78a |
| Rajkumar | 108.73b | 7.54a |
| Levels of NPK | ||
| 50% RDF | 118.09bc | 8.39b |
| 75% RDF | 129.35bc | 8.97ab |
| 100% RDF | 144.32b | 9.43a |
| 125% RDF | 149.57a | 10.07a |
| 150% RDF | 153.27a | 9.17ab |
| 100% PK | 62.66d | 5.29d |
| 100% NK | 129.75bc | 7.85bc |
| 100% NP | 107.41c | 6.89c |
| Control | 54.12d | 4.62d |
| Sources of variation | ||
| Year | ns | ns |
| Cultivar | ns | ns |
| Levels of NPK | ** | ** |
| Year × cultivar | ns | ns |
| Year × levels of NPK | ns | ns |
| Cultivar × levels of NPK | ns | ns |
| Year × cultivar × levels of NPK | ns | ns |
Within cultivar, levels of NPK or year, numbers followed by different letters indicate significant differences at p ≤ 0.05 (otherwise statistically at par); ns: non-significant (p > 0.05);
**Significant at p ≤ 0.01;
Recommended dose of fertilizer (RDF), 200-60-60 kg N-P2O5-K2O ha−1