Visible injury "is a term used to indicate necrosis on the leaf surface."

“可见危害”这个名词常常指叶面的坏死。

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Study on the Relationship Between Leaf Content of Manganese and Internal Bark Necrosis Disease of Apple Trees;

利用万用电表对板栗枝干病害的病情程度与树皮电阻值的关系进行了研究。

youdao

Study on the Relationship Between Leaf Content of Manganese and Internal Bark Necrosis Disease of Apple Trees;

利用万用电表对板栗枝干病害的病情程度与树皮电阻值的关系进行了研究。

youdao