Table 9.
Grain yield (Mg ha–1) and stover yield (Mg ha–1) of maize as influenced by year, cultivar, and levels of NPK.
| Treatments | Grain yield | Stover yield |
|---|---|---|
| Year | ||
| Year 1 | 7.62a | 5.83a |
| Year 2 | 8.16a | 6.06a |
| Cultivar | ||
| P3522 | 8.34a | 6.71a |
| P3396 | 7.78a | 5.89a |
| Rajkumar | 7.54a | 5.24a |
| Levels of NPK | ||
| N100P30K30 (50% RDF) | 8.39b | 6.13bcd |
| N150P45K45 (75% RDF) | 8.97ab | 6.57abc |
| N200P60K60 (100% RDF) | 9.43a | 7.25ab |
| N250P75K75 (125% RDF) | 10.37a | 7.61a |
| N300P90K90 (150% RDF) | 9.17ab | 6.80ab |
| P60K60 (100% RDF–N) | 5.29d | 4.53ef |
| N200K60 (100% RDF–P) | 7.85bc | 5.54cde |
| N200P60 (100% RDF–K) | 6.89c | 5.11def |
| Control (–NPK) | 4.62d | 3.98f |
| Source 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 |
Year 1 and year 2 represent winter 2012–13 and 2013–14, respectively. Within year, cultivar, and levels of NPK, 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.