Nuts
Nut crops such as hazelnut, almond, walnut, and pistachio play an important role due to their high economic value and relevance for the food industry. These tree species prefer well-drained, deep soils with good organic matter content and are sensitive to waterlogging and prolonged nutrient deficiencies. Increasingly frequent water, salt, and temperature stress can reduce fruit set and seed quality.
The use of biostimulants is strategic for promoting root development, optimizing nutrient uptake, and increasing resilience to abiotic stress, thus improving yield, kernel size, and oil content.
The almond tree (Prunus dulcis) is a fast-growing tree species belonging to the Rosaceae family, characterized by its early entry into production. It is a typically Mediterranean plant, sensitive to late frosts and prolonged water stress, which can negatively affect flowering, fruit set, and kernel development. It flowers very early, between late winter and early spring, with hermaphroditic flowers born on one-year-old shoots. The fruit is a dry drupe consisting of a fleshy hull that dries at maturity, leaving the woody endocarp (shell) that contains the edible seed.
Hazelnut (Corylus avellana) is a tree species belonging to the Betulaceae family, valued for its high-commercial-value nuts. It has a bush or tree-like growth habit and good productive longevity. It flowers between late winter and early spring, with pendulous male catkins and small female flowers located at shoot tips or laterally, which determine nut set. The fruits, enclosed in a leafy husk, ripen between late summer and autumn. Hazelnut prefers deep, fertile, well-drained, slightly acidic soils and temperate climates.
The pistachio (Pistacia vera L.) is a tree species belonging to the Anacardiaceae family, characterized by slow growth and late entry into production, generally after 5–7 years from planting. It is a typically xerophilous and thermophilous plant, sensitive to late frost and to excessive or prolonged waterlogging. It is a dioecious species, with unisexual flowers lacking corolla, borne on axillary inflorescences: male plants produce the pollen needed to fertilize the female ones, with pollination occurring by wind (anemophilous pollination).
Walnut (Juglans regia) is a tree species belonging to the Juglandaceae family, characterized by long lifespan and vigorous growth. It is sensitive to waterlogging, late frost, and summer drought stress, all of which can compromise flowering and fruit set. It flowers in spring with pendulous male catkins and female flowers located at the tips of current-year shoots. The fruit, a drupe with a woody endocarp containing the edible kernel, ripens between late summer and early autumn.
Walnut prefers temperate climates and deep, fertile, well-drained soils with slightly alkaline pH. Under these conditions, it expresses its full potential in terms of yield, nut size, and kernel oil content, producing walnuts of high commercial quality.
Walnut prefers temperate climates and deep, fertile, well-drained soils with slightly alkaline pH. Under these conditions, it expresses its full potential in terms of yield, nut size, and kernel oil content, producing walnuts of high commercial quality.