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Using open top chambers, effects of elevated O3 (80 nmol mol-1) and CO2 (700 μmol mol-1), alone and in combination, were studied on young armand pine (Pinus armandii Franch.) trees. Current-year needles were collected after a growth season in all the treatments. No marked changes were found in the needles under elevated CO2 exposure alone. Needles biomass was significantly decreased by elevated O3...
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