Application of anaerobically digested biosolids effects soil phosphorus levels
Biosolids are an excellent source of nitrogen (N), phosphorus (P), and zinc (Zn) when applied at agronomic rates (Barbarick et al., 2017). One concern remains, the over-application of P resulting from addition of biosolids to satisfy plant N needs. Concerns about environmental contamination from the introduction of P into waterways may change biosolids land application limitations to be based on plant P needs. Another issue associated with P accumulation is the form of P found in soils. A method developed by Kuo (1996) allows the separation of total P into various forms that could be affected ...
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