70年代，高產玉米和土豆品種、化肥和農藥已經開始進入中國

來源: 西河於 2013-10-10 11:53:58 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

農民開始悄悄私種自留地，自產自食

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