For 2 seasons now, an area of the allotment : 2 x 1 metres, refuses to
produce anything - not even weeds. I transplanted some brasica seedlings in
Spring. Outside the dead area, these grew to full size. Within this area,
they withered and died (took about 4 months and they didn't grow higher than
4 inches).
Prior to my taking the allotment over - it had been overgrown for about 7 or
so years. Any ideas would be appreciated.

Pete.