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Slow release urea 1 and sulfur - coated urea had the effects of slowing release under field conditions.
田间条件下,缓1与硫包膜尿素均有缓释效果.
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The film surface of coated urea particles was checked by scanning electron microscopy ( SEM ).
通过扫描 电镜 检测包膜尿素和膜层的形貌特徵.
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