Critical levels and loads of nitrogen for vegetation growing on different soils /
Ashenden, T. W.
Jones, M. L. M.
Rafarel, C. R.
Institute of Terrestrial Ecology.Bangor Research Unit.
Bangor : Bangor Research Unit,
1997.
At head of title: Institute of Terrestrial Ecology (Natural Environment Research Council) Project T07064L5.
DOE/NERC contract EPG 1/3/15.
Final report.
Includes bibliographical references.