Dryland salinity, the gradual loss of farm and grazing land to rising salt, is a massive problem, hard to comprehend and harder still to stop.There is salt everywhere; vast amounts of it, mostly located underground. It has built up over many thousands of years, originating from the weathering of rock minerals or the simple act of sea salt dropping via rain or wind.Many of the woodland species, for example, have deep roots and a high demand for water. Whilst the system was in balance, the salt stayed put.

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