Abstract:<p>In many poorly drained agricultural regions, humans have introduced expansive networks of subsurface tile drains and straightened headwater streams to improve drainage. These networks serve as a direct link between cropland and larger streams and rivers, but the transport and retention of nutrients like phosphorus (P) in these networks is not well understood. Here we evaluate transport and retention of dissolved P and fine particles (which sorb dissolved P) within an agricultural drainage ditc… Show more
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