Water will not be the only resource in short supply, as drylands of the world become even drier

Plant production could decline as climate change affects soil nutrients

The cliff face of Cedar Mesa, in southeast Utah, overlooks one of many sites sampled in the world's drylands.

by Staff Writers Flagstaff AZ (SPX) Nov 04, 2013

As drylands of the world become even drier, water will not be the only resource in short supply. Levels of nutrients in the soil will likely be affected, and their imbalance could affect the lives of one-fifth of the world's population.
That includes people living in Arizona, who may be in for a dustier future.
The findings are presented in a study published in Nature that details how soil changes may occur and discusses the implications. Co-author Matthew Bowker, assistant professor of forest soils and ecosystem ecology at Northern Arizona University, was involved with the project since 2009.
Bowker explained that most of the 17 nutrients that plants need to grow to their potential are soil resources, such as nitrogen and phosphorus. The statistical model he helped develop for the study suggests that as the climate becomes more arid, nitrogen will decrease and phosphorus will increase.
"Both are essential for plant growth, and both are typical components of fertilizer, but both need to be around in the right quantities for plant growth to proceed most efficiently," Bowker said.

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