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Soil fertility of 0–20 cm soil layer before sowing in Shanxi field experimental.
| Year | Soil depth (cm) |
Organic matter (g kg–1) | Total nitrogen (g kg–1) |
Alkaline hydrolysis N (mg kg–1) | Available P (mg kg–1) |
Available K (mg kg–1) |
pH |
|---|---|---|---|---|---|---|---|
| 2020–2021 | 0–20 | 13.54 | 0.78 | 68.50 | 10.06 | 96.25 | 6.88 |
| 2021–2022 | 0–20 | 12.88 | 0.74 | 69.17 | 7.89 | 106.20 | 7.04 |
