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How to Test if Fertilizer Has Nitrates in it

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In this video we show you how to test if a fertilizer has nitrates rather than urea or ammonia as its nitrogen source.The idea is quit simple, in a strongly acidic solution the nitrates will behave like nitric acid and dissolve copper metal releasing nitrogen dioxide gas. Looking for this gas...

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THƯ VIỆN VIDEO CLIP - How to Test if Fertilizer Has Nitrates in it