Question

What are the type of phosphate ions available for plant uptake in alkali soil ?

• A. \(\text{H}_2\text{PO}_4^{2-}\)
• B. \(\text{HPO}_4^{-}\)
• C. \(\text{PO}_4^{3-}\)
• D. \(\text{H}_3\text{PO}_4\)

Hint:

- Acidic soils (pH < 7.0): \(\text{H}_2\text{PO}_4^-\) is the dominant form absorbed by plants.
- Alkaline/Alkali soils (pH > 7.0): \(\text{HPO}_4^{2-}\) is the dominant form available for plant uptake.

Answer 1

The Correct Option is B