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Nitrogen Fixation: Nodulation Capacities

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When comparing nodule specific nitrogenase activities in control and nitrate treated plants at 20% oxygen, why is it necessary to express nitrogenase activity per gram fresh weight of nodule tissue? Ideas are presented.

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This solution compares nodulation capacities.

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For better comparison of the nodulation capacities (nodule specific nitrogenase activities) between the different plants (control and nitrate treated), it's better to express nitrogenase activity per ...

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