Table 1.
Location of sampling sites and soil properties.
| Fields | Location | Soil properties |
|||||
|---|---|---|---|---|---|---|---|
| Soil organic matter /(g kg−1) |
Available phosphorus /(mg kg−1) |
Total nitrogen /(g kg−1) |
pH | Cation exchange capacity /(cmol kg−1) |
|||
| Corn | 40°11′27″N 116°35′36″E |
Humus horizon | 11.5 | 10.0 | 1.0 | 7.89 | 13.4 |
| Eluvial horizon | 10.2 | 20.0 | 1.1 | 7.76 | 11.5 | ||
| Pepper | 40°11′22″N 116°35′23″E |
Humus horizon | 12.0 | 10.3 | 1.1 | 7.96 | 10.4 |
| Eluvial horizon | 12.0 | 11.0 | 1.1 | 7.86 | 13.2 | ||
| Peanut | 40°11′24″N 116°34′33″E |
Humus horizon | 11.7 | 15.3 | 1.1 | 7.06 | 12.5 |
| Eluvial horizon | 11.3 | 12.9 | 1.0 | 7.82 | 13.5 | ||
| Cucumber | 40°11′1″N 116°35′37″E |
Humus horizon | 13.4 | 9.2 | 1.1 | 7.86 | 12.8 |
| Eluvial horizon | 12.6 | 14.8 | 1.1 | 7.84 | 13.1 | ||