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Table 3.
Content of available essential nutrients in the soil of experimental plots (0-40 cm)
| Treatment | Hydrolyzable N, mg kg-1 soil | P2O5, mg kg-1 soil | K2O, mg kg-1 soil | CaO Mmol/100 g-1 soil |
|---|---|---|---|---|
| ‘Zhigulevskoye’ | ||||
| Control | 114.5 | 122.8 | 133.1 | 19.2 |
| ZP | 110.7 | 129.5 | 136.4 | 18.6 |
| ZP+ZFN | 107.4 | 131.9 | 135.8 | 19.7 |
| ZP+ZFN+BF | 99.2 | 126.6 | 140.8 | 18.7 |
| ZP+ZFN+BF+AF | 156.1 | 144.5 | 142.7 | 19.5 |
| ‘Lobo’ | ||||
| Control | 117.8 | 117.9 | 136.2 | 17.3 |
| LP | 118.7 | 98.8 | 144.4 | 16.9 |
| LP+LFN | 113.8 | 144.7 | 135.9 | 17.6 |
| LP+LFN+BF | 148.6 | 133.8 | 117.7 | 16.3 |
| LP+LFN+BF+AF | 157.4 | 163.4 | 155.8 | 16.1 |
| Optimum levels of soil nutrients for chernozems in Central Russia | 151-200 | 151-200 | 121-180 | - |
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