Evaluation of polysulfone hollow fibres and ceramic suction samplers as devices for the in situ extraction of soil solution D. L. JonesA. C. Edwards Research Article Pages: 157 - 165
The course of 15N-ammonium nitrate in a spring barley cropping system G. J. M. VosB. DuquetJ. A. Neyroud Research Article Pages: 167 - 175
Quantitative and qualitative seasonal changes in the microbial community from the phyllosphere of sugar beet (Beta vulgaris) I. P. ThompsonM. J. BaileyJ. M. Whipps Research Article Pages: 177 - 191
Nitrogen uptake in barley after spring incorporation of 15N-labelled Italian ryegrass into sandy soils Ingrid K. Thomsen Research Article Pages: 193 - 201
Response of tomato cultivars to salinity F. Perez AlfoceaM. T. EstañM. C. Bolarín Research Article Pages: 203 - 211
Crop residue application increases nitrogen fixation and dry matter production in groundnut (Arachis hypogaea L.) grown on an acid sandy soil in Niger, West Africa F. -P. RebafkaB. J. NdunguruH. Marschner Research Article Pages: 213 - 222
Xylem-solute technique to measure N2 fixation by Phaseolus vulgaris L.: Calibration and sources of error Alexander P. HansenBenjavan RerkasemPeter Martin Research Article Pages: 223 - 231
Decay rate and substrate quality of fine roots and foliage of two tropical tree species in the Luquillo Experimental Forest, Puerto Rico Janine BloomfieldKristiina A. VogtDaniel J. Vogt Research Article Pages: 233 - 245
Further evidence that zinc is required throughout the root zone for optimal plant growth and development Ross O. NableMichael J. Webb Research Article Pages: 247 - 253
Ethylene and carbon dioxide concentrations of soils as influenced by rhizosphere of crops under field and pot conditions T. OtaniN. Ae Research Article Pages: 255 - 262
Seasonal uptake of 15N-nitrate and distribution of absorbed nitrogen in peach trees N. MuñozJ. GuerriE. Primo-millo Research Article Pages: 263 - 269
Soil aluminium effects on uptake, influx, and transport of nutrients in sorghum genotypes V. C. BaligarR. E. SchaffertA. F. De C. Bahia Filho Research Article Pages: 271 - 277
Direct assessment of mineral phosphorus availability to tropical crops using 32P labelled compounds R. D. ArmstrongK. R. HelyarR. Prangnell Research Article Pages: 279 - 287
Boron deficiency in soybean [Glycine max (L.) Merr.] peanut (Arachis hypogaea L.) and black gram [Vigna mungo (L.) Hepper]: Symptoms in seeds and differences among soybean cultivars in susceptibility to boron deficiency B. RerkasemR. W. BellJ. F. Loneragan Research Article Pages: 289 - 294
Effects of Frankia on field performance of Alnus clones and seedlings O. Q. HendricksonD. BurgessL. Chatatpaul Research Article Pages: 295 - 302
Effects of drought on the yellowing status and the dynamics of mineral elements in the xylem sap of declining spruce (Picea abies L.) E. DambrineN. CariseyA. Granier Short Communication Pages: 303 - 306
Response of soybean genotypes to boron, zinc and manganese deficiency in tissue culture M. J. GrahamD. L. HeavnerJ. M. Widholm Short Communication Pages: 307 - 310