539582.fig.003a
(a)
539582.fig.003b
(b)
539582.fig.003c
(c)
539582.fig.003d
(d)
Figure 3: Topsoil (0–25 cm) content of ignition loss (subplot A), P-AL (subplot B), K-AL (subplot C), and K-HNO3 (subplot D) for the six cropping systems CA1 (conventional arable: ○), CA2 (conventional arable, environmentally sound: □), OA (organic arable: ∆), CM (conventional mixed dairy: ●), OM1 (organic mixed dairy: ▲), and OM2 (organic mixed dairy with 75% clover ley: ■).