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Table 4.
Crop rotation productivity due to nitrogen rates and humus balance, per 1 ha per year.
| Nitrogen applied*, kg / ha | Humus balance, GJ / ha | Arable land productivity, GJ / ha |
|---|---|---|
| Cereals 50%, row crops 50% | ||
| 64 | -28.9 | 79.9 |
| 135 | 11.5 | 102.0 |
| Cereals 60%, row crops 40% | ||
| 0 | -33.1 | 44.9 |
| 40 | -23.5 | 54.5 |
| 160 | 6.5 | 86.1 |
| Cereals with maize (Z. mays L.) 70%, alfalfa (Medicago sativa L.) 20%, sunflower (Helianthus annus L.) 10% | ||
| 0 | -9.2 | 24.6 |
| 84 | 1.5 | 41.4 |
| Cereals with maize (Z. mays L.) 64%, row crops and alfalfa (M. sativa L.) 18% each | ||
| 0 | -19.4 | 45.3 |
| 79 | -16.1 | 61.2 |
| 158 | 2.8 | 80.3 |
| Cereals 40%, row crops 60% | ||
| 0 | -19.8 | 30.6 |
| 60 | -14.4 | 42.6 |
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