Open Access
Table 1.
The content of nitrate nitrogen in the soil layer of 0–30 cm under wheat depending on the predecessor, methods of basic tillage and fertilizers, on average over the years of research
| Soil treatment | Fertilizers | Average values | ||
|---|---|---|---|---|
| NO3 content in soil by the hases, mg/kg | ||||
| tillering | grain formation | before harvesting | ||
| Black fallow | ||||
| Fallowing to a depth of 25–27 cm | Without fertilizers | 23.53 | 9.88 | 14.71 |
| N30 | 41.30 | 18.82 | 22.21 | |
| N30 + N30 | 43.74 | 20.74 | 22.80 | |
| Loosening to a depth of 10–12 cm | Without fertilizers | 24.37 | 9.57 | 13.68 |
| N30 | 39.77 | 17.64 | 19.74 | |
| N30 + N30 | 41.18 | 19.03 | 21.64 | |
| Without autumn mechanical treatment | Without fertilizers | 19.98 | 8.59 | 10.72 |
| N30 | 34.02 | 13.07 | 16.99 | |
| N30 + N30 | 35.59 | 14.79 | 18.60 | |
| Average | 33.72 | 14.68 | 17.80 | |
| Seed fallow | ||||
| Fallowing to a depth of 25–27 cm | Without fertilizers | 20.09 | 9.41 | 13.48 |
| N30 | 37.01 | 17.30 | 18.94 | |
| N30 + N30 | 40.09 | 18.66 | 20.01 | |
| Loosening to a depth of 10–12 cm | Without fertilizers | 19.41 | 9.98 | 12.56 |
| N30 | 35.40 | 16.44 | 18.35 | |
| N30 + N30 | 37.04 | 18.82 | 18.46 | |
| Without autumn mechanical treatment | Without fertilizers | 16.71 | 8.57 | 10.44 |
| N30 | 32.21 | 13.08 | 13.77 | |
| N30 + N30 | 32.71 | 13.78 | 13.21 | |
| Average | 30.07 | 14.00 | 15.50 | |
| Green fallow | ||||
| Fallowing to a depth of 25–27 cm | Without fertilizers | 21.80 | 9.05 | 14.00 |
| N30 | 42.31 | 18.38 | 20.42 | |
| N30 + N30 | 41.65 | 17.69 | 20.75 | |
| Loosening to a depth of 10–12 cm | Without fertilizers | 20.16 | 8.65 | 12.64 |
| N30 | 38.31 | 17.76 | 19.12 | |
| N30 + N30 | 37.07 | 16.72 | 20.01 | |
| Without autumn mechanical treatment | Without fertilizers | 16.91 | 8.47 | 10.50 |
| N30 | 34.52 | 15.23 | 15.65 | |
| N30 + N30 | 34.95 | 14.76 | 15.28 | |
| Average | 31.96 | 14.08 | 16.60 | |
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