Measurement of biological dinitrogen fixation in grassland: Comparison of the enriched 15N dilution and the natural 15N abundance methods at different nitrogen application rates and defoliation frequencies H. Høgh-JensenJ. K. Schjoerring Research Article Pages: 153 - 163
Redox conditions and iron chemistry in highland swamps of Burundi J. G. GenonN. de HepcéeP. A. Hennebert Research Article Pages: 165 - 171
Senescence and protein remobilisation in leaves of maturing wheat plants grown on waterlogged soil Pia A. StiegerUrs Feller Research Article Pages: 173 - 179
Transfer of nitrogen from damaged roots of white clover (Trifolium repens L.) to closely associated roots of intact perennial ryegrass (Lolium perenne L) D. J. HatchP. J. Murray Research Article Pages: 181 - 185
Site factors, foliar nutrient levels and growth of Cordia alliodora plantations in the humid lowlands of Northern Costa Rica C. BergmannM. StuhrmannW. Zech Research Article Pages: 193 - 202
Transpiration measurements on apple trees with an improved stem heat balance method F. P. WeibelJ. A. de Vos Research Article Pages: 203 - 219
Influence of NO3 - and NH4 + nutrition on fermentation, nitrate reductase activity and adenylate energy charge of roots of Carex pseudocyperus L. and Carex sylvatica Huds. exposed to anaerobic nutrient solutions Ewald MüllerBert P. AlbersPeter Janiesch Research Article Pages: 221 - 230
Denitrification and the evolution of nitrous oxide after the application of cattle slurry to a peat soil S. C. JarvisD. J. HatchJ. V. Klarenbeek Research Article Pages: 231 - 241
Concentration-dependent influence of quercetin on nodulation process and the main characteristics of soybean inoculated with Bradyrhizobium japonicum N. MihailovićM. BogdanovićD. Radin Research Article Pages: 243 - 246
Role of root derived organic acids in the mobilization of nutrients from the rhizosphere David L. JonesPeter R. Darrah Research Article Pages: 247 - 257
Root turnover of groundnut (Arachis hypogaea L.) in soil tubes U. KraussJ. W. Deacon Research Article Pages: 259 - 270
The effect of soil phosphorus on the external mycelium growth of arbuscular mycorrhizal fungi during the early stages of mycorrhiza formation J. C. C. de MirandaP. J. Harris Research Article Pages: 271 - 280
Assimilation of exogenous 2′-14C-indole-3-acetic acid and 3′-14C-tryptophan exposed to the roots of three wheat varieties D. A. MartensW. T. Frankenberger Jr. Research Article Pages: 281 - 290
A rapid method for the visualisation of soil macropores Nicholas M. Holden Short Communication Pages: 291 - 294
The effect of soil microflora on the survival of cuttings of Epacris impressa Cassandra McLeanAnn C. LawrieKevin L. Blaze Short Communication Pages: 295 - 297