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← Nature & AnimalsWhich outcome accelerates if legume root nodules decompose?
A)Increased nitrogen immobilization by microbes
B)Decreased nitrogen fixation overall rate
C)Reduced symbiotic relationship with Rhizobia
D)Elevated soil nitrate concentrations locally✓
💡 Explanation
Nodule decomposition releases fixed nitrogen as ammonium (NH4+), which soil bacteria quickly convert to nitrate (NO3-) via nitrification. This increases soil nitrate concentration locally because nitrification accelerates rather than causing decreased fixation or a symbiotic breakdown, therefore accelerating nitrate abundance.
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