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SPAD values in leaves (6th to 12th leaves) from rapeseed grown in monocrops with one (R) or two plants (RR) per pot and in mixture with clover (R-Clover) (A), lupine (R-Lupine) (B) and vetch (R-Vetch) (C). Vertical bars indicate ± S.E. (n = 5). # indicates significant differences between SPAD values of leave from monocrops R and RR and * indicates significant differences between SPAD value of leaf number from rapeseed grown in monocrop R and in mixture (p < 0.05).
