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Fig. 2. Daily measurements of labeled fertilizer N (LFN) and total N evolved as N2 and N2O from Kentucky bluegrass cores fertilized with 15N-labeled KNO3 during the summer field experiment. Mass spectrometric results from the three 3-h flux measurements from within each replication were summed, and values are reported as a mean of two replications. Daily atmospheric volume measurements were performed using the Ne technique during collection of N2 and N2O. Volume measurements are reported in mL as means of the two replications. Standard errors are reported for each calculated mean.
