Insoluble phosphoric acid


  • Webster's Revised Unabridged Dictionary
    • Insoluble phosphoric acid (Agric. Chem) phosphoric acid combined in acid salts, or in neutral or basic salts, which are respectively soluble and insoluble in water or in plant juices.
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In literature:

This form still continues to take on lime and by and by gets back to the original insoluble form called insoluble phosphoric acid.
"The First Book of Farming" by Charles L. Goodrich