<tr><td>[[Iron filings (ZVI)]]</td><td>Proven phosphorus retention</td><td>May harm plants<ref>Logsdon SD, Sauer PA. Iron Filings Cement Engineered Soil Mix. Agron J. 2016;108(4):1753. doi:10.2134/agronj2015.0427.</ref></td></tr> | <tr><td>[[Iron filings (ZVI)]]</td><td>Proven phosphorus retention</td><td>May harm plants<ref>Logsdon SD, Sauer PA. Iron Filings Cement Engineered Soil Mix. Agron J. 2016;108(4):1753. doi:10.2134/agronj2015.0427.</ref></td></tr> |