U.S. and global soil moisture improved throughout the 20th century as our planet warmed in its recovery from the Little Ice Age.
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When the next food crop is planted, it benefits from the nutrients and improved physical properties of the soil that the trees have provided.
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Over time, communication improved between the farmers in Awo and other villages about how to capture more soil and water for instance, by changing the shape of the dams and reinforcing them.
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