1. Cotton walnut

Cotton walnut is an excellent walnut variety. The fruit is small to medium-sized, the color of the shell is yellowish brown, the base is slightly pointed, and the upper part of the walnut is more prominent. , the engravings on the shell are relatively large and shallow. The cotton walnut tree has a strong and upright tree posture. The male flowers bloom in late March, the female flowers are in full bloom in mid-April, and the nuts mature in early September. The cotton walnut has a long life and high yield.

2. Seed Walnut

The fruit of Hemp Walnut is nearly spherical, about 5 cm in length and 4 cm in diameter. It is covered with sparsely glandular hairs or nearly hairless. The top part of the walnut is Has a pointed tip. The core is almost spherical, with a pointed top. There are 8 longitudinal ridges on the walnut. The endocarp has thick walls and irregular gaps. Ma walnuts are semi-wild walnuts and are the main Wenwan walnut species.

3. Iron Walnut

The fruit of Iron Walnut is round in shape, with a yellow-green outer skin and a furry surface. The shell of the iron walnut fruit is hard and thick, and it can make the sound of gold and stone when it hits each other. You can choose the larger ones with more peculiar shapes as cultural toys, which is a very good handicraft.

4. Keppel walnuts

Keppel walnuts are also called Keppel walnuts, butt walnuts, ghost walnuts, Japanese walnuts, etc. The fruit has 8 obvious ridges and sutures. More protruding, the shell is hard and thick.

5. American black walnut

American black walnut is a plant belonging to the walnut family. It is the tree species with the highest economic value for both wood and fruit. Black walnut wood has a tight structure, high mechanical strength, beautiful texture and color, and is easy to process. It is an excellent plywood and can be used for furniture, craft carvings, architectural decoration, etc., and has become a symbol of elegance and wealth.

The demand in the international market is increasing day by day. The kernels of black walnut nuts are rich in nutrients and have a strong flavor. They can be eaten raw or roasted. They are widely used as ingredients in ice cream and candies. They are the best-selling precious nutritional food in the United States. Black walnut begins to bear fruit 6 years after planting. It has the characteristics of vigorous growth, deep roots and tall stems, long life, few pests and diseases, and high economic value. It has always been the main tree species planted in agricultural forests and plains greening in the central United States. The Lucheng agricultural cultivation trial in Luoyang, Henan Province was successful.