老美的玉米帶、大豆洲，效率奇高橫掃對手。隱患是一旦爆發未知病害，有大麵積絕收的風險，如愛爾蘭土豆大饑荒。

來源: 十具於 2025-08-17 06:34:10 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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