Assertion: jerusalem artichoke's leaf | /r/PartOf | about 40% of the plant dry
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Source sentences:
text: When fully grown in October, it reaches a height of about 2.5 m. Mid-season, the leaves can make up about 40% of the plant dry mass, while the stalk grows thicker and at the time of harvest in November dominates the dry mass of aerial parts [ 15 19 ].