Open Access
Table 2.
Productivity of crop rotations depending on the duration of research and fertilization, GJ* ha-1 * year-1.
| Crop rotations | Fertilizer variants | |||
|---|---|---|---|---|
| O1 | O2 | O3 | O4 | |
| 1st rotation cycle | ||||
| I | 64.2 | 68.0 | 65.7 | 69.1 |
| II | 65.0 | 69.1 | 65.3 | 70.3 |
| Last (5th) rotation cycle | ||||
| I | 55.6 | 62.0 | 58.5 | 67.4 |
| II | 58.0 | 62.9 | 59.3 | 68.8 |
| Average for 1992‐2015 | ||||
| I | 57.8 | 63.8 | 60.3 | 68.7 |
| II | 59.2 | 64.7 | 61.5 | 69.9 |
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