Determining When Trees Are Drought Stressed

Unlike most annual crops, the roots of long-lived trees can penetrate through soils to great depth to reach water (Figure 1).  If we can’t tell how deeply roots penetrate, how do we determine when trees run out of water?  One way is to monitor the moisture status of leaves and twigs, because these are connected through the sapwood in branches, stems, and roots to water deep underground.

A New (and Free!) e-book on urban resilience is here!

Resilience Matters is compilation of articles and op-eds advancing a holistic, transformative approach to thinking and action on urban resilience in the era of climate change, grounded in a commitment to sustainability and equity.

Can Cities Pivot on Climate in 2019?

2018 was full of grim climate news. 2019 could be the year cities turn this around. 

The Devaluation of Assets in Black Neighborhoods

“When people reflectively say after something goes wrong in the black community that ‘it all starts at home,’ I want them to shift talking about this cultural pathology to one of structural racism.”

A new Farm Bill, but the same old heartburn…

Both houses of the US Congress passed a compromise on a newly revised Farm Bill this week. This encyclopaedic legislation allocates nearly $100 billion of taxpayer money annually for food assistance, farm subsidies, on-farm conservation incentives and a dozen other programme categories.

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