Walnut in Kurdistan

The Juglans regia L. walnut tree. Belongs to the Juglandaceae family consisting of seven genera, the Juglans genus includes twenty species, all producing edible nuts, Walnut wood is prized for its beauty and highly valued by woodworkers. Wood is strong, durable, and resistant to pests, rarely cracks, and does not change its volume when heated. Walnut trees prefer deep, fertile soils and warm, temperate climate with a total higher annual rainfall of more than 700 mm is sufficient for cultivation of In winter and autumn, walnuts require cool enough weather to meet the need for cooling and a temperature of 25-35 ºC in spring and summer that is sufficient to support normal growth and maturation. Despite their health advantages, walnut trees excrete several substances that have inhibited the seed germination and seedling growth of various plants acts as bioherbicide, fungicide, bactericide, insecticide