Table 1 Physical and chemical soil characteristics at the study site
Soil type | Soil depth (m) | pH | Clay (%) | Silt (%) | Fine sand (%) | Coarse sand (%) | Bulk density (g cm−3) | P (%) | K (%) |
|---|---|---|---|---|---|---|---|---|---|
Ingrowth-core soil | 8.1 | 12.5 | 12.4 | 45.5 | 28.9 | 0.004 | 0.041 | ||
Field soil | 0–0.25 | 7.6 | 13.0 | 15.2 | 42.3 | 27.8 | 1.56 | 0.042 | 0.110 |
0.25–0.75 | 7.8 | 20.2 | 12.9 | 40.3 | 26.1 | 1.64 | 0.013 | 0.084 | |
0.75–1.5 | 4.5 | 19.9 | 16.3 | 37.8 | 25.9 | 1.76 | 0.006 | 0.065 | |
1.5–3.0 | 8.2 | 19.3 | 18.9 | 36.6 | 25.1 | 1.77 | < 0.004 | 0.074 | |
3.0–4.5 | 8.1 | 19.0 | 25.9 | 33.1 | 21.7 | 1.77 | 0.004 | 0.111 |