© 1977 by Institute of Chartered Foresters
Ground Vegetation and Humus Nitrogen Levels as Indicators of Nitrogen Status in an Established Sand-Dune Forest
The Macaulay Institute for Soil Research Craigiebuckler, Aberdeen. AB9 2QJ
Department of Forestry, University of Aberdeen St. Machar Drive, Aberdeen. AB9 2UU
Association-analyses of the ground vegetation in two nitrogen-fertilizer experiments in pole-stage pine growing on wind blown sand suggested that the appearance, in order, of Agrostis tenuis, Rumex acetosella, Chamaenerion angustifolium, and Holcus lanatus was associated with increasing rates of nitrogen. In the forest as a whole, the progressive appearance of these species was found to be indicative of both increasing tree growth and increasing concentration of nitrogen in the humus. In particular, the level of nitrogen in the humus is suggested to be a good, and possibly useful, measure of the nitrogen status of the site.