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Chlorophylls and carotenoids content in the leaves of raspberry plants grown under various red (R660)–far-red (FR) light ratio. Means ± standard error (SE); means followed by the same letter were not different at p ≤ 0.05. Treatment 1—0% R660 + 100% FR; Treatment 2—30% R660 + 70% FR; Treatment 3—70% R660 + 30% FR; Treatment 4—100% R660 + 0% FR.
