Table 3 Ecological conditions and statistics of the test sites
La Petite Charnie | Vierzon | Vincence | Sillegny | |
|---|---|---|---|---|
Latitude | 48°05′ 12″ N | 47°15′ 44″ N | 46°58′ 12″ N | 48°59′ 24″ N |
Longitude | 00°09′ 40″ W | 02°07′ 55″ E | 03°38′ 07″ E | 06°07′ 56″ E |
Altitude | 146–154 m | 154–173 m | 235–240 m | 200–212 m |
Topography | Flat with small valleys | Flat | Flat with small valleys | Flat |
Total number of Q. petraea (and Q. robur) provenances | 94 (8) | 90 (7) | 103 (11) | 103 (15) |
Total area (experimental area) | 24.54 ha (19.26 ha) | 43.58 ha (20.36 ha) | 28.60 ha (23.80 ha) | 27.26 ha (23.29 ha) |
Spacing | 3 × 1.75 m | 3 × 1.75 m | 3 × 1.75 m (except set 2, 3 × 2 m) | 3 × 1.75 m |
Soil | Brown soil Sand, silt and clay | Podzol Sand | Brown soil Silt and clay | Brown soil Silt and clay |
Annual mean temperature | 10.80 °C | 11.22 °C | 10.85 °C | 9.65 °C |
Warmest month mean temperature | 18.40 °C | 19.15 °C | 18.95 °C | 18.10 °C |
Coldest month mean temperature | 3.55 °C | 3.15 °C | 2.70 °C | 1.10 °C |
Rainfall | 710 mm | 688 mm | 747 mm | 739 mm |
Rainfall during growing season | 329 mm | 351 mm | 408 mm | 392 mm |
Potential evapotranspiration (PET) | 813 mm | 868 mm | 852 mm | 786 mm |
PET during growing season | 625 mm | 640 mm | 628 mm | 598 mm |