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Volume 17 Number 25:  18 June 2014

Editorial
The Role of Atmospheric CO2 Enrichment in Human Nutrition: Is it positive or negative?

Subject Index Summary
Progressive Nitrogen Limitation Hypothesis (Loblolly Pine): The progressive nitrogen limitation (PNL) hypothesis posits that low concentrations of soil nitrogen will curtail the ability of the productivity-enhancing effect of atmospheric CO2 enrichment to maintain increased plant growth and ecosystem carbon sequestration rates over long periods of time; and in this document this possibility is explored as it pertains to loblolly pine (Pinus taeda L.) trees.

Journal Reviews
The Recent History and Imminent Future of Global Flooding: What has it been? ... what will it be? ... and why do we need to know?

Searching for Megadroughts in CMIP5 Climate Models: What are the odds we may find some?

One Hundred Years of European Forest Stand Dynamics: In what ways have they changed? ... and what are the implications?

Future Winter Wheat Yields on the North China Plain: Are they apt to be enhanced, degraded or little affected by predicted climate change?

Old Growth Forests Still Socking Away Carbon and Nitrogen: How do the old-timers do it?

An Unanticipated Benefit of Drought in Certain Forests: What could it possibly be???