Chinese Grain for Green Program led to highly increased soil organic carbon levels: a meta-analysis.

Sci Rep · 2014 · PMC3967516 · PMID 24675818

Europe PMC DOI

hedged sentence

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The sentences

an increasing trendno p-value reported

Generally, the SOC also showed an increasing trend with increasing duration after CCF.

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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.