Black Walnut ( Juglans nigra )

Fruit Warehouse | Black Walnut ( Juglans nigra ) | More nuts are produced by open-grown trees. Black walnut is more resistant to frost than the English or Persian walnut, but thrives best in the warmer regions of fertile, Lowland Soils with a high water table. Nuts are harvested by hand from wild trees. The black walnut nutmeats are used as an ingredient in food, while the hard black walnut shell is used commercially in abrasive cleaning, cosmetics, and oil well drilling and water filtration. 

Juglans nigra, the Eastern black walnut, a species of Flowering trees in the walnut family, Juglandaceae, is native to eastern North America. Isolated wild trees in the upper Ottawa Valley may be an isolated native population or may have derived from Planted trees. The black walnut is a large deciduous tree attaining heights of 30-40 meters (98-130 ft). The tree tends to crop more Heavily in alternate years.

Black walnut plantings can be made to Produce timber, nuts, or both timber and nuts. Varieties include Purdue # 1, the which can be used for both timber and nut production, nut though quality is poor compared to varieties specifically selected as nut producers. A variety index and characteristics guide is available from Missouri Extension. Pollination requirements should be Considered when planting black walnuts. Produce pollen first and then pistillate flowers or else Produce pistillate flowers and then pollen.

Black walnut nuts are shelled commercially in the United States. An analysis of nut oils from five named J. nigra cultivars (Ogden, Sparrow, Baugh, Carter and Thomas) That showed the most prevalent fatty acid in J. nigra oil is linoleic acid (27.80-33.34 g/100g dry kernel), Followed (in the same units) by oleic acid (14.52-24.40), linolenic acid (1.61-3.23), palmitic acid (1.61-2.15), and stearic acid (1.07-1.69). The oil from the cultivar Carter had the highest mole percentage of linoleate (61.6), linolenate (5.97%), and palmitate (3.98%); the oil from the cultivar had the highest mol Baugh percentage of oleate (42.7%); the oil from the cultivar Ogden has the highest mole percentage of stearate (2.98%).