Vegetatio 103: 217-218, 1992. Volume contents Markert, B., Presence and significance of naturally occurring chemical elements of the periodic system in the plant organism and consequences for future investigations on inorganic environ- mental chemistry in ecosystems Barik, S. K., H. N. Pandey, R. S. Tripathi & P. Rao, Microenvironmental variability and species diversity in treefall gaps in a sub-tropical broadleaved forest Briske, D. D. & V. J. Anderson, Competitive ability of the bunchgrass Schizachyrium scoparium as affected by grazing history and defoliation Chidumayo, E. N., Seedling ecology of two miombo woodland trees Jeanfils, J. & J. P. Tack, Identification and study of growth and nitrogenase activity of nitrogen fixing cyanobacteria from tropical soil Rheinhardt, R. D., Disparate distribution patterns between canopy and subcanopy life-forms in two temperate North American forests Fuls, E. R., G. J. Bredenkamp & N. van Rooyen, Plant communities of the rocky outcrops of the northern Orange Free State, South Africa Fischer, A., Long term vegetation development in Bavarian Mountain Forest ecosystems follow- ing natural destruction Nakashizuka, T., S. lida, H. Tanaka, M. Shibata, S. Abe, T. Masaki & K. Niiyama, Community dynamics of Ogawa Forest Reserve, a species rich deciduous forest, central Japan Buttler, A., Permanent plot research in wet meadows and cutting experiment Stampfli, A., Year-to-year changes in unfertilized meadows of great species richness detected by point quadrat analysis Hegg, O., Long term influence of fertilization in a Nardetum The experimental field of Dr. Werner Ludi on the Schynige Platte Dahler, W., Long term influence of fertilization in a Nardetum The management of great quantities of data from permanent plots Dahler, W., Long term influence of fertilization in a Nardetum Results from the test plots of Dr. W. Ludi on the Schynige Platte Hegg, O., U. Feller, W. Dahler & C. Scherrer, Long term influence of fertilization in a Nardetum Phytosociology of the pasture and nutrient contents in leaves Diemer, M., Population dynamics and spatial arrangement of Ranunculus glacialis L., an alpine perennial herb, in permanent plots Book reviews Lieth, H., The global change program of ISCU A new challenge for vegetation scientists and ecologists Volume contents