The walnut (Juglans regia L.) is a plant native to Asia (Himalayan), introduced in Europe in ancient times for its edible fruit.
spread throughout the world, in Italy the walnut growing fruit, usually promiscuous, has some relevance only in Campania.
The walnut can be grown for timber production or for both purposes. The walnut tree is vigorous, with its solid trunk, tall, straight, majestic bearing, has strong roots and taproot.
The leaves are deciduous, compound, alternate (consisting of 5-7-9 and, more rarely, 11 leaves).
is a monoecious plant where the male flowers are grouped in catkins pendulous, 10-15 cm long, with numerous stamens, which appear on the branches of the previous year before the leaves appear.
Flowers unisexual female hatch gems mixed after the men's (proterandria), are solitary or in groups of 2-3, 4 rarely appear on the new shoots of the year, while the leaves. The fruit is a drupe, consisting dall'esocarpo (husk) fleshy, fibrous, black at maturity and releases the woody endocarp, which is the nut itself, consists of two shells that enclose the nut, with a high lipid content. Limits
soil and climate: sensitive to stagnant water and water stress resulting from loose soil, does not tolerate heavy soils, asphyxiated, and can withstand even high calcium content. Keep from excess heat (hot and cold).
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