1、? Wan Wen Walnut: It is distributed in China, Hebei, Tianjin, Shanxi and some mountainous areas (Nankou and Xiakou).

2. Wan Wen Juglans regia: distributed in Yunnan, southeastern Tibet, southern Sichuan, Guizhou and other places.

Second, the growth characteristics are different

1、? Wan Wen Walnut: It likes light, fat and dry air, but it is sensitive to soil moisture. Too dry or too wet soil is not conducive to the growth and fruiting of walnuts; I like loose soil and good drainage, and I can't grow well in the soil with high groundwater level and heavy viscosity; But it grows best in slightly alkaline soil containing calcium; Too much salt will lead to death.

2. Wan Wen Iron Walnut: Strong affinity, strong growth potential, poor cold resistance, adapted to subtropical climate. It is a common rootstock for plateau cultivation in Yunnan, Guizhou and Sichuan provinces in China.

Thirdly, as a Wan Wen walnut, its characteristics are different.

1, Ma Jutao: "It's not cool in winter, but it's not impetuous in summer". At the same time, it can also carve handicrafts with colors like agate and jade, which are valuable.

2. Wan Wen Iron Walnut: It has huge volume, peculiar shape and relatively low price.

Baidu encyclopedia-iron walnut

Baidu encyclopedia-walnut

Baidu Encyclopedia-Wan Wen Walnut