@article {1703,
	title = {Reduced nitrogen has a greater effect than oxidised nitrogen on dry heathland vegetation},
	volume = {154},
	year = {2008},
	pages = {359-369},
	keywords = {acidification, amino acids, ammonium toxicity, competition, decline, deposition, grass encroachment, herbaceous species, mesocosins, n enrichiuent, netherlands, nh4+/no3- ratios, nitrate, pinus-nigra, soil, vascular plants},
	author = {Van den Berg, L. J. L. and Peters, C. J. H. and Ashmore, M. R. and Roelofs, J. G. M.}
}
