Open Access
Table 2.
Influence of fertilizer rates on changes in the content of mobile forms of phosphorus and potassium
| years | Fertilizer rate, kg/ha of active substance | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Phosphoric | Potassium | ||||||||
| 0 | 250 | 750 | 2400 | 0 | 300 | 900 | 1950 | 3900 | |
| Dynamics P2O5, mg/100 g of soil | Dynamics of K2O, mg/100 g of soil | ||||||||
| 1 | 10 | 13 | 15 | 24 | 12 | 18 | 26 | 49 | 82 |
| 2 | 10 | 13 | 18 | 22 | 11 | 21 | 23 | 30 | 47 |
| 3 | 11 | 14 | 17 | 20 | 11 | 19 | 20 | 33 | 35 |
| 4 | 11 | 16 | 17 | 23 | 14 | 15 | 15 | 22 | 24 |
| 5 | 12 | – | 13 | 25 | 6 | – | 9 | 10 | 10 |
| 6 | 13 | – | 19 | 25 | 7 | – | 7 | 11 | 11 |
| 7 | 13 | – | 13 | 29 | 6 | – | 6 | 4 | 9 |
| 1 | 10 | 13 | 15 | 24 | 12 | 18 | 26 | 49 | 82 |
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