The process by which soil bacteria convert NH₃ or NH₄ to nitrate (NO_3-)is called A)assimilation. B)denitrification. C)fixation. D)nitrification. E)ammonification.

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The process described is nitrification, which is the conversion of NH4+ or NH3 to nitrate (NO3-) by soil bacteria. Assimilation refers to the uptake of nitrogen by plants, denitrification is the conversion of nitrate back to N2 gas by bacteria, fixation is the conversion of atmospheric nitrogen gas to a usable form by plants or bacteria, and ammonification is the conversion of organic nitrogen to NH4+ by bacteria.

The Process by Which Soil Bacteria Convert NH3 or NH4

The Process by Which Soil Bacteria Convert NH₃ or NH₄