TABLE 2.
Soil parameters from five different sampling sites
| Parameter | Value at site: |
||||
|---|---|---|---|---|---|
| Northern Germany (NG) | Central Germany (CG) | Northern France (NF) | Southern France (SF) | Portugal (PO) | |
| Land use type | Apple plantation | Prepared field site | Vineyard | Vineyard | Vineyard |
| pH | 4.9 | 6.0 | 7.0 | 6.3 | 4.4 |
| TOC content (mg/liter) | 105 | 167 | 54 | 20 | 12 |
| TN content (mg/liter) | 27 | 13 | 4 | 3 | 3 |
| C-to-N ratio | 5.1 | 7.4 | 17.4 | 14.0 | 4.0 |
| Al (mg/kg) | 47,000 | 56,200 | 35,750 | 38,750 | 47,300 |
| Cu (mg/kg) | 60 | 18 | 119 | 51 | 25 |
| Fe (mg/kg) | 35,900 | 39,750 | 35,000 | 32,300 | 40,450 |
| Mn (mg/kg) | 827 | 1,220 | 1,040 | 393 | 387 |
| Zn (mg/kg) | 102 | 103 | 61 | 78 | 78 |
| Rainfall (mm) (avg annual precipitation 2012–2014) | 710 | 1,096 | 829 | 353 | 822 |
| Maximum daily temp (°C) (avg 2012–2014) | 13.5 | 8.8 | 17.2 | 17.3 | 18.8 |
| Soil texture (%) | |||||
| Sand | 8.8 | 10.6 | 9.2 | 26.1 | 14.0 |
| Silt | 70.2 | 51.2 | 58.0 | 7.6 | 45.9 |
| Clay | 2.0 | 1.2 | 1.2 | 0.2 | 1.0 |