Table 1 Soil characteristics
Soil-ID | Geographic origin | Management | Soil type | Texture | Soil pH | C org | Phosphorus | ||
|---|---|---|---|---|---|---|---|---|---|
Clay | Sand | Silt | (CaCl2) | CAL/DLd | |||||
(%) | (%) | (%) | (%) | (mg P kg−1) | |||||
1-Buusa | Buus (Switzerland) | Rotation: Lay rotation Fertilization: organic, low input Site type: farmer field site | Loamy soil | 29.9 | 3.90 | 66.2 | 6.6 | 2.64 | 6.5 |
2-Castela | Castel Volturno (Italy) | Rotation: Maize-clover Fertilization: mineral, low input Site type: farmer field site | Vertic Xerofluvent | 36.5 | 19.0 | 44.5 | 7.3 | 1.34 | 19.2 |
3-Humpoleca | Humpolec (Czech Republic) | Rotation: P-WW-SBc Fertilization: mineral, low input Site type: experimental station | Cambisol Loamy sand | 15.9 | 52.9 | 31.2 | 5.2 | 1.63 | 45.0/59.8 |
4-Lukaveca | Lukavec (Czech Republic) | Rotation: long-term protection area around field experiment Fertilization: none Site type: experimental station | Cambisol Loamy sand | 14.0 | 56.0 | 30.0 | 5.4 | 1.5 | 48.0/49.8 |
5-Vördenb | Vörden (Germany) | Rotation: before 2009 grazing area for wildlife – since 2009 field forage cultivation Fertilization: low input (organic and mineral) Site type: farmer field site | Cambisol | 12.0 | 41.1 | 46.9 | 5.0 | 0.72 | 11.4/9.4 |
6-Taastrupa | Taastrup (Denmark) | Rotation: Barley-barley Fertilization: no P fertilizer since 1964 Site type: long-term field trial | Sandy loam | 13.4 | 55.4 | 31.2 | 5.8 | 1.09 | 15.3/17.9 |