Question

Rice plants have a specific preference for the form of nitrogen they uptake. Which form is most efficiently absorbed by rice under submerged conditions, and why is it preferred?

A Nitrate form (NO₃⁻), due to its high solubility
B Ammonical form (NH₄⁺), because it is more stable in anaerobic soils
C Urea form (CO(NH₂)₂), for its slow-release properties
D Nitrite form (NO₂⁻), due to its rapid absorption
E Elemental nitrogen, for direct assimilation by roots
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