Cfb — oceanic temperate
Île-de-France is first and foremost a major agricultural region behind its urban image: Brie (deep silts, cereal soils among Europe's best), French Vexin, Île-de-France's Beauce and Hurepoix support intensive wheat-rapeseed-barley cropping. With 1,156 GDD, 280 frost-free days and a penalising summer water deficit (-203 mm), the region depends on high-water-holding soils (loam pH 6.9) to secure yields. Laboulet offers Île-de-France ultra-early to early maize hybrids for irrigated plots, drought-tolerant sunflowers suited to deep silts, and oilseed linseed to diversify the dominant short rotations.
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Varieties adapted to this zone, by crop type
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