Latitude and longitude | 51.78N, 0.26W | 52.40N, 0.20E | 53.53N, 2.74W | 51.57N, 1.83W | 51.43N, 2.64W |
National grid reference | TL 200100 | TL 497798 | SD 512040 | SU 122858 | ST 556698 |
Altitude (m O.D.) | 80 | 13 | 105 | 100 | 20 |
Annual rainfall (mm) | 675 | 550 | 900 | 700 | 900 |
Windiness (DAMS) scorez | 12 | 12 | 13 | 12 | 10 |
Soil and soil-forming materials | Sandy loam topsoil and subsoil | 300 mm clay topsoil over clay subsoil | Imported, various | Coral Rag limestone | 100 mm topsoil over Keuper Marl |
Ground preparation | Complete cultivation to 1.0 m using excavator | Complete cultivation to 1.0 m using excavator | Loose tipping | Loose tipping | Complete cultivation to 1.0 m using excavator |
Soil thickness (m) | 1.0 | 1.0 | 1.5 | 1.5 | 1.5 |
Topsoil pHy | 6.9–7.2 | 7.3–8.1 | 8.0–8.7 | 8.3 | 8.0–8.3 |
Topsoil organic carbon (%) | 1.8 | 3.7 | 1.4 | 1.2 | 4.6 |
Topsoil phosphorus (mg/L)y | 9.2 | 16.1 | 16.2 | 4.0 | 8.0 |
Topsoil potassium (mg/L)y | 79 | 303 | 81 | 88 | 82 |
Planting year | 1993/1996 | 1994 | 1994 | 1994 | 1994 |