There was shortage of research on the content of medium and micro elements, and how to manage the micro elements was restricted to the development of Guizhou flue-cured tobacco production.
贵州省植烟土壤及烟叶中量与微量元素含量研究不足，烤烟生产微肥施用不合理等问题，已制约全省烟叶品质的提高。
There was shortage of research on the content of medium and micro elements, and how to manage the micro elements was restricted to the development of Guizhou flue-cured tobacco production.
贵州省植烟土壤及烟叶中量与微量元素含量研究不足，烤烟生产微肥施用不合理等问题，已制约全省烟叶品质的提高。
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