Preferable form of nitrogen for rice under submerged soil conditions is ____________?
Correct answer: A. NH4
- A. NH4
- B. NO3
- C. NO2
- D. All of these
Explanation
Under submerged, oxygen-deficient soil conditions, nitrate is rapidly denitrified, whereas ammonium remains available to rice roots. Therefore NH₄⁺ is the preferable nitrogen form in flooded rice soils.
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