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尿素价格为何创十年新高？郑风田：粮价何时能追上农资？
尿素价格创下十年以来最高 为什么粮价可以调控但农资价格很难调控？ 究竟是什么原因导致化肥农资价格涨上了天？ 有什么办法可以避免这一问题的出现？
《郑说三农》67/224
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