Global patterns of nitrate storage in the vadose zone.

Nat Commun · 2017 · PMC5680259 · PMID 29123090

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may be significantno p-value reported

2 ) can give a first global indication to policymakers and decision makers of where N legacy issues may be significant and delay improvements in groundwater and surface water quality.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.