the nitrogen cycle

the nitrogen cycle 1.before you read the passage, talk about these questions. 1 how is nitrogen added to soil? 2 why must farmers monitor nitrogen levels in soil? nitrogen is a crucial nutrient for growing plants. without the nitrogen cycle,which restores nutrient-poor soil, plants could not survive. during this cycle,nitrogen takes on many forms. it starts in the atmosphere as nitrogen gas. in this form plants cannot absorb it. that changes after fixation, the next phase of the nitrogen cycle. during fixation, bacterial turn nitrogen into ammonia. in the next phase, mineralization, decomposers in the soil turn ammonia into nitrites and nitrates- forms of nitrogen that can use. finally, during dentrification bacteria reduce nitrates back into nitrogen gas.of course, the …

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