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The Ogallala Aquifer is a large underground water resource that sits below parts of seven U.S. states in the Midwest.2014-03-23 编辑：Sunny
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In a fast-changing world beset by unpredictable climate conditions, farmers cannot afford to ignore new technology.2014-07-31 编辑：Sunny
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Grasslands cover one third of the Earth's surface. Grasslands are known by many names, such as savannah, prairie, steppes or the plains.2015-10-16 编辑：max
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"My mother was a gardener," he says. Each spring, as she got her garden ready, she would spray water on the dirt, and tell him to plunge his hands deep into the wet soil.2018-10-28 编辑：Sara
