青云翻译

Because the rhizomes after the first use of the use of ammonium nitrate, so the ph down first, and then increased

Because the rhizome used ammonium nitrate after, so pH decline, after the rise

Because after the rhizome uses the ammonium condition nitrogen to use the nitric nitrogen first, therefore pH drops first, latter rises

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Because the rhizome used ammonium nitrate after, so pH decline, after the rise