Fig 1. Surface pH against time.

Fig 1. Surface pH against time. pH 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 8.8 • 92 93 94 95 96 97 98 99 00 01 02 • Year

Figure 2. Conductivity of soil water against time. The declining phase is modelled by the function y = 4.69*exp(-0.29*(year-1993)) hence T½ = 2.4 years Figure 2: Conductivity of soil water against time Conductivity, mS cm-1 0 2 4 6 8 10 12 • 92 93 94 95 96 97 98 99 00 01 02 • Year

Figure 3: Soil mass loss on ignition vs time % Loss on ignition 0 5 10 15 20 • 92 93 94 96 97 98 00 01 02 • Year

Figure 4. Soil surface pH and organic matter as a function of fertiliser treatment. b c pH 7.9 8.0 8.1 8.2 8.3 10 11 12 13 %LOI ab b a a None Chemical Organic Fertiliser treatment

Figure 5: Soil nitrate against distance from site centre at the final harvest in 2002 y = 0.19 + 0.016*X r = 0.33** NO3, mg 100g-1 0 0.25 0.5 0.75 1.0 c c 0 5 10 15 distance from centre of site, m

Fig 6: % Plant cover against time as a function of initial fertilizer treatment Mean % cover, bars show 1s.e. 0 20 40 60 80 100 Control Chemical Manure 91 92 93 94 95 96 97 98 99 00 01 02 Year

Key 91-94 95-98 99-02 Ca Figure 7. DCA ordination of the floral data Lc Fa Di Vt Ap -100 0 100 200 300 400 Cr Bg 2nd DCA axis (Eigenvalue = 0.265) Sm c Pm Fh Mo Lc Vm Lg Hl Dc Vc Hr -100 0 100 200 300 400 500 1st DCA axis (Eigenvalue = 0.599)

Fig 1. Surface pH against time.

Fig 1. Surface pH against time.

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