Journal Article The Solubility of Phosphates in Neutral Ammonium Citrate Solution Get access K D Jacob, K D Jacob Fertilizer and Fixed Nitrogen Investigations, Bureau of Chemistry and Soils, U. S. Department of Agriculture, Washington, D. C Search for other works by this author on: Oxford Academic Google Scholar K C Beeson, K C Beeson Fertilizer and Fixed Nitrogen Investigations, Bureau of Chemistry and Soils, U. S. Department of Agriculture, Washington, D. C Search for other works by this author on: Oxford Academic Google Scholar L F Rader, Jr., L F Rader, Jr. Fertilizer and Fixed Nitrogen Investigations, Bureau of Chemistry and Soils, U. S. Department of Agriculture, Washington, D. C Search for other works by this author on: Oxford Academic Google Scholar W H Ross W H Ross Fertilizer and Fixed Nitrogen Investigations, Bureau of Chemistry and Soils, U. S. Department of Agriculture, Washington, D. C Search for other works by this author on: Oxford Academic Google Scholar Journal of Association of Official Agricultural Chemists, Volume 14, Issue 2, 15 May 1931, Pages 263–283, https://doi.org/10.1093/jaoac/14.2.263 Published: 21 February 2020