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Abstract The effect of C 2 H 2 on nitrification in soils was determined to evaluate the use of C 2 H 2 in field and laboratory denitrification studies. The presence of as little as 0.1% (vol/vol) C 2 H 2 completely inhibited nitrification. The effect of C 2 H 2 was reversible, but an 8‐ to 10‐day period was required before nitrification returned to the rate in the control. The results suggest that the C 2 H 2 approach must be limited to those experiments in which either only nitrate fertilizers are used or where nitrification is assumed complete before denitrification commences.
Walter et al. (Mon,) studied this question.