The 15N enrichment of the pasture increased with increasing
fertiliser rate (P<0.001) and ranged from 0.87 to 2.48, 0.69 to 2.53
and 0.62 to 2.23 atom% in the F2U0, F2UA and F2US treatments,
respectively, and 1.38–3.24, 0.95–3.40 and 0.80–3.12 in the F4U0,
F4UA and F4US treatments, respectively (data not presented). The
pasture 15N enrichment was greatest under nil urine (P<0.001),
with no difference in the 15Nenrichment due to autumn and spring
applied urine
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