Contact: Eric Sorensen
Washington State University
Caption: Rhoda Mang'yana of Malawi is one of thousands of African farmers improving their depleted soil by growing trees and annual crops that stay in the ground two years or more. Here she grows maize near "fertilizer trees" to improve her farm's crop yield and soil fertility.
Credit: ŠJim Richardson
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Related news release: Researchers propose new way to save Africa's beleaguered soils