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1971年秋天,一次偶然的机会将草木灰倒在苹果树烂根部,第二年发现该树树势有所恢复,又长出了新根,这一发现说明草木灰有可能治疗苹果根
The fall of 1971, an accidental opportunity to fall ash in the roots of apple trees, found the tree the next year some recovery, but also grow new roots, the findings suggest that ash may cure apple roots