539582.fig.004a
(a)
539582.fig.004b
(b)
539582.fig.004c
(c)
539582.fig.004d
(d)
Figure 4: Calculated soil system budgets of N, P, and K for the years 2001–2010 plotted, respectively, against 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: ■).