QARSHI, Uzbekistan -- On an unseasonably mild spring afternoon, second-generation farmer Diyor Juraev gathered a group of worried growers in a wheat field outside Qarshi, a city in southern Uzbekistan.

"Not enough time, not enough support": Uzbekistan, a landlocked country slightly bigger than California, is facing the consequences of a history of poor irrigation, with rising salinity slashing the size of usable growing areas. © Nikkei montage
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