Effect of grade of acetylene on ethylene production by white clover (Trifolium repensL.), during acetylene reduction assays of nitrogen fixation

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Abstract
Acetylene reduction assays of nitrogen fixation were carried out on intact white clover (Trifolium repens L.) plants, and soil cores from a white clover sward using acetylene gas from three sources. Commercial grade acetylene gave significantly lower ethylene production than instrument grade acetylene or scrubbed commercial grade acetylene.