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What are the newly introduced and newly discovered variant types of walnut?
1. Extra-large walnut. The longitudinal diameter of the nut can reach 7~8 cm, the lateral diameter is 5 cm, and a single nut weighs about 36 grams, equivalent to about 3 times that of an ordinary walnut, but the shell is relatively thick, and sometimes the kernel is not plump. 2. Shell-less walnut. The hard shell of the nut has degenerated into a thin film, which is very easy to tear off by hand
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