Table 3.
Chemical properties of the top 0–60 cm layer of soil in experimental fields at Pengyang Experimental Station, Ningxia Province, China in 2015 and 2016.
| Soil layer (cm) | SOC (g kg−1) | SAN (mg kg−1) | SAP (mg kg−1) | SAK (mg kg−1) | STN (g kg−1) | Porosity (%) |
|---|---|---|---|---|---|---|
| 0–20 | 9.78 | 61.52 | 11.26 | 168.29 | 1.01 | 49.81 |
| 20–40 | 7.99 | 43.86 | 7.67 | 119.36 | 0.93 | 47.92 |
| 40–60 | 7.61 | 40.65 | 5.85 | 100.15 | 0.91 | 50.19 |
Note; SOC: soil organic carbon; SAN: soil available nitrogen; SAP: soil available phosphorus; SAK: soil available potassium; STN: soil total nitrogen.