Phosphorus in soil is transformed into insoluble compounds unless what happens?

Soluble phosphorus — sometimes called available inorganic phosphorus. ... When fertilizer or manure (both containing mostly soluble phosphorus) is added to soil, the soil's pool of soluble phosphorus increases. With time, soluble phosphorus is transformed slowly to less-soluble (less plant-available) forms.

Explanation:

answer; polycythemia is the correct answer;