条件筛选
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What are the excellent foreign walnut varieties?
1. Chandler. Source and distribution: native to the United States, it is a hybrid progeny of Pedro XUC56 - 224. It is the main early-bearing walnut variety planted in the United States and was introduced into China in 1984. Economic traits of the fruit: the nut is large, with an average three-diameter measurement of 4.4 cm and an average single-nut weight of 12.86 g. The nut shell