Soil bacteria are responsible for any steps in the nitrogen cycle. soil bacteria are not responsible for a) assimilation. b) nitrification. c) ammonification. d) nitrogen fixation.

Soil bacteria are responsible for any steps in the nitrogen cycle. Soil bacteria are NOT responsible for assimilation.

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A. assimilation

Soil bacteria are responsible for nitrification, ammonification and nitrogen fixation but are not responsible for assimilation.

Assimilation is a process by which plants incorporate nitrate and ammonia produced by the nitrogen fixation and nitrification processes performed by the soil bacteria. Plants obtain these forms of nitrogen through  roots, and utilize them for producing proteins and nucleic acids.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

looks like the answer is     c     to me!