Effects of elevated atmospheric CO2 concentrations, clipping regimen and differential day/night atmospheric warming on tissue nitrogen concentrations of a perennial pasture grass.

There was a marginally significant warming effect (Table 1 , P warming = 0.047) where litter N concentration averaged across harvests was higher under a continuous warming scenario (9.1 mg g −1 ) than under ambient warming (7.6 mg g −1 ).

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