Table 1 Soil physical and chemical properties of different crop types.
From: Effect of crop type shift on soil C:N:P stoichiometry in a typical Yellow River irrigated district
Depth | Crop types | pH | Salinity | SOM | Sand | Silt | Clay |
|---|---|---|---|---|---|---|---|
(−) | (g/kg) | (%) | |||||
0–20 | SF† | 8.8 ± 0.5a‡ | 2.8 ± 4.4a | 8.6 ± 1.8b | 62.2 ± 12.5a | 32.0 ± 9.4a | 5.8 ± 3.7a |
OL | 8.4 ± 0.2b | 1.8 ± 2.6a | 12.3 ± 3.9a | 66.1 ± 10.4a | 29.2 ± 9.2a | 4.8 ± 2.3a | |
20–40 | SF | 9.1 ± 0.6a | 2.3 ± 1.2a | 10.0 ± 4.7a | 69.0 ± 15.5a | 26.8 ± 12.7a | 4.3 ± 3.5a |
OL | 8.5 ± 0.1b | 0.9 ± 0.6a | 9.4 ± 3.1a | 60.7 ± 24.5a | 28.0 ± 11.1a | 4.6 ± 2.3a | |
40–60 | SF | 9.2 ± 0.6a | 1.8 ± 1.0a | 7.0 ± 1.8a | 64.7 ± 14.8a | 29.0 ± 10.3a | 6.3 ± 4.6a |
OL | 8.5 ± 0.2b | 1.0 ± 0.6a | 6.6 ± 2.1a | 66.8 ± 26.2a | 22.9 ± 10.9a | 2.9 ± 2.1a | |
60–80 | SF | 9.1 ± 0.6a | 1.5 ± 1.0a | 6.8 ± 2.5a | 59.1 ± 16.0a | 33.4 ± 11.9a | 7.4 ± 4.2a |
OL | 8.6 ± 0.3b | 1.4 ± 0.8a | 8.0 ± 1.5a | 54.7 ± 28.4a | 33.9 ± 17.9a | 5.3 ± 4.4a | |
80–100 | SF | 9.0 ± 0.5a | 2.3 ± 1.6a | 7.3 ± 2.0a | 55.0 ± 16.5a | 35.9 ± 13.8a | 9.1 ± 3.9a |
OL | 8.6 ± 0.3b | 1.3 ± 0.9a | 7.1 ± 2.6a | 57.4 ± 26.2a | 30.4 ± 15.1a | 5.7 ± 3.3a | |
