Nitrification is the microbial process responsible for converting which form of nitrogen in the soil?

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Ammonium nitrogen (NH4+) into nitrate nitrogen (NO3-) in the soilNitrite nitrogen (NO2-) into nitrate nitrogen (NO3-) in the soilNitrate nitrogen (NO3-) into ammonium nitrogen (NH4+) in the soilNone of the aboveNot applicable

Explanation

Nitrification is a biological process where soil bacteria convert ammonium (NH4+) into nitrate (NO3-), which plants can absorb more readily. While the transformation of nitrite (NO2-) to nitrate (NO3-) is a step within nitrification, the overall process begins with ammonium oxidation.