Crop yield response to climate change varies with crop spatial distribution pattern.

Sci Rep · 2017 · PMC5431105 · PMID 28469171

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an increasing trendno p-value reported

On the negative side, extreme weather events such as drought have exhibited an increasing trend 11 – 13 and resulted in declined crop production 4 , 6 , 14 .

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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.