Response to elevated CO2 in the temperate C3 grass Festuca arundinaceae across a wide range of soils.

Front Plant Sci · 2015 · PMC4338673 · PMID 25774160

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only marginally significantno p-value reported

For example the soil × CO 2 interaction was significant for P, K, Ca, and Zn, and only marginally significant for Mg, Mn, and Fe.

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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.