田地里氮肥的流失最大，年年要大量补充。钾肥磷肥在地里停留时间长。总之，石油决定粮食生产。

来源: tzbcwbc 于 2015-07-22 10:52:35 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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