Fig. 5.

N content and total N amount (A) and S contents (C) of rapeseed and N (B) and S (D) contents in soil (g.kg⁻¹ of soil) in monocrops (white bars) with one or two rapeseed plants per pot (R and RR, respectively) or in mixtures (grey bars) with lupine, clover and vetch (R-Lupine, R-Clover and R-Vetch, respectively) at harvest time. Vertical bars indicate ± S.E. (n = 5). Different letters indicate that mean values are significantly different at p < 0.05.