The results are reported from an experitneni on the eftecis of culting date (14 June. 21 July and 1 September), tertiiizer appiicalion (none or 80 kg ha' N plus 40 kg h;r' P iind K) and grazing treatments (none, ;iutumn or aurtimn plus spring) on lhe vegetation ol' an upland mesotrophic grassland in UpperTee.sdale. northern England, UK.Ettects on planl species number and cover are reported for 4 years (1989-93) of treatment. Effects on 'species -attribute.s' are given for the fourth year.The ce.ssation of grazing combined with the use of fertilizer progre.ssively reduced species number by nboul 25%. Under traditional management (no fertilizer, cutting date on 21 July, autumn and spring gracing) the species number and cover remained relatively static over the 4 years.Comparison between treatments in the fourth year showed a reduction in species number under the fertilizer application, cutting dale on 1 September and no-grazing treatmenis. Fertilizer use together with cutting dale on i Seplember particularly lowered species numher and cover.Analysis of variance was used to assess the effect of treatment on species that occurred frequently in the sward. A cutting date of ! September favoured tPresenl Address: Peak Nalional i'ark, Aidem House. Ba.sluw Road. Bakewell. Derbyshire DE4 lAE, UK. §Pre.sen[ Address; ADAS Anhur Rick*o

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