Leaf colors comparation key ring for rice or other crops Nitrogen content test( FJ-901 )


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Company: An Jarl Enterprise Co., Ltd
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All products of this seller: An Jarl Enterprise Co., Ltd


4 green sheets from No. 2 to No. 4 to compare the leaf color to judge the Nitrogen content of leaf. Depend on the judgement to determinate how to adjust the nutrient or fertilization. The 4 sheets link together as a key ring makes it easy to carry. The relation between leaf color and nitrogen ferti ...

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