[KongchangAI]
Unverified80% confidenceFactTime unknown

美国玉米平均亩产从1960年代的每英亩约55蒲式耳增长到2023年的超过每英亩175蒲式耳

1
Sources
80%
Confidence
Long-term
Relevance
6/1/2026
First Seen

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