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Nature & Animals

Which 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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