At pH 4.0 the predominant ionic form of phosphorus present is
A. HPO4
B. $${{\text{H}}_2}{\text{PO}}_4^ - $$
C. $${\text{PO}}_4^{3 - }$$
D. None of these
Answer: Option B
Solution(By Examveda Team)
Phosphorus is most abundant in the soil at pH 6 to 7, but at pH 4, i.e. in acidic soils, the dominant ionic form of phosphorus present is orthophosphates, i.e., $${{\text{H}}_2}{\text{PO}}_4^ - .$$ Availability of phosphorus decreased with an increase in pH. But to maintain the availability of phosphorus at a high pH, the percentage of organic matter in the soil is important.Related Questions on Agronomy
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