条件筛选
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What are the main contents of the national standards for japonica rice
According to national standards, japonica rice is divided into grades one, two, three, four and six. Among them, the minimum quality index for the brown rice yield of grade-one early japonica and japonica glutinous rice is 81%, with impurities at 1%, and the color and odor must be normal. For grade-one late japonica rice in Class I regions, the minimum quality index for brown rice yield is 82%, and in Class II
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How many categories can fish food be divided into by form, and what are the characteristics of each?
How many categories can fish food be divided into by form? What are the characteristics of each?