Deep, permeable soils buffer impacts of crop fertilizer on Amazon streams, study finds

The often damaging impacts of intensive agriculture on nearby streams, rivers, and their wildlife has been well documented in temperate zones, such as North America and Europe. Yet a new study in an important tropical zone—the fast-changing southern Amazon, a region marked by widespread replacement of native forest by cattle ranches and more recently croplands—suggests that at least some of those damaging impacts may be buffered by the very deep and highly permeable soils that characterize large areas of the expanding cropland.

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