我老家也是70年左右糧食產量開始大幅度上升，就是樓下網友說的，種子，灌溉，化肥，農藥以及種植方法的改進

來源: speedingticket 於 2021-05-23 16:39:56 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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