The diversity of arable plants - past, present and some futures
L G Firbank, Institute of Terrestrial Ecology, Grange over Sands, UK

Soil seed bank diversity under integrated and conventional farming systems
N E Jones and K A Maulden, ADAS Boxworth, Cambridge, UK

Germination of seeds from two non-target plant species subjected to sublethal herbicide dosages
A B Hald, National Environmental Research Institute, Roskilde, Denmark

Space for endangered plants in arable landscapes
P J Wilson, Wessex Environmental Associates, Salisbury, UK