Evaluation of N2-fixation and nitrogen economy of a maize/cowpea intercrop system using15N dilution methods Francis OforiJ. S. PateW. R. Stern OriginalPaper Pages: 149 - 160
Physiological responses of cotton to a single waterlogging at high and low N-levels W. S. MeyerD. C. ReicoskyR. C. G. Smith OriginalPaper Pages: 161 - 170
Effects of natural and artificially induced reduction on soil solution phosphorus in rice soils A. B. HusinA. G. CaldwellF. J. Peterson OriginalPaper Pages: 171 - 175
Soil factors influencing ferric hydroxide plaque formation on roots ofTypha latifolia L S. M. MacfieA. A. Crowder OriginalPaper Pages: 177 - 184
Leaching of subterranean clover-derived N from a loam soil Michael M. Müller OriginalPaper Pages: 185 - 191
The effect of air humidity on nutrient uptake of some greenhouse plants H. R. GislerödA. R. Selmer-OlsenL. M. Mortensen OriginalPaper Pages: 193 - 196
Effects of ethylene oxide on soil microbial content and some soil chemical characteristics M. GennariM. NegreR. Ambrosoli OriginalPaper Pages: 197 - 200
Effect of phosphorus fertilizer on A values for soils cropped with winter wheat A. N. Sharpley OriginalPaper Pages: 201 - 205
A comparative study of the soil zinc fractions determined by chemical methods and electro-ultrafiltration (EUF) and their relations to zinc nutrition in rice A. S. P. MurthyH. G. Schoen OriginalPaper Pages: 207 - 210
Effect of trickle fertigation with three forms of nitrogen on soil pH, levels of extractable nutrients below the emitter and plant growth R. J. HaynesR. S. Swift OriginalPaper Pages: 211 - 221
Nutrient concentrations in litterfall from some western conifers with special reference to calcium C. W. KiilsgaardS. E. GreeneS. G. Stafford OriginalPaper Pages: 223 - 227
Effects of carbon and nitrate additions to soil upon leaching of nitrate, microbial predators and nitrogen uptake by plants Karl RitzBryan S. Griffiths OriginalPaper Pages: 229 - 237
Influence of Captan on some microorganisms and microbial processes related to the nitrogen cycle Anjana BanerjeeA. K. Banerjee OriginalPaper Pages: 239 - 245
Agronomic properties of a volcanic ash-derived soil as affected by uncomposted organic materials A. RamunniR. ScialdoneV. Pignalosa OriginalPaper Pages: 247 - 251
Access tube location within a simulated potato crop and the measurement of soil moisture with a neutron probe D. K. L. MackerronR. A. Jefferies Short Communications Pages: 253 - 255
Effect of soil liming and vesicular-arbuscular-mycorrhizal inoculation on the growth and micronutrient content of the teff plant Tekalign MamoK. S. Killham Short Communications Pages: 257 - 259
Phosphorus status of some ethiopian soils Tekalign MamoI. Haque Short Communications Pages: 261 - 266
The effects of a high level of N, applied at planting, on nodulation of soybean (Glycine max (L.) Merr.) by diverse strains of Bradyrhizobium A. K. La FavreA. R. J. Eaglesham Short Communications Pages: 267 - 270
Allelopathic effects of volatiles from some Cruciferae species on lettuce, barnyard grass and wheat growth W. Oleszek Short Communications Pages: 271 - 273
Aluminium concentration in the biomass of native species of the Morichals (swamp palm community) at the Orinoco Llanos, Venezuela M. A. MazorraJ. J. San JoseM. Haridasan Short Communications Pages: 275 - 277
Phytotoxin resistance ofRhizobium meliloti mutants I. S. Alsaadawi Short Communications Pages: 279 - 282
Callose deposition in leaves of cowpea (Vigna unguiculata [L.] Walp.) as a sensitive response to high Mn supply A. H. WissemeierW. J. Horst Short Communications Pages: 283 - 286
Distribution of chloride in tobacco laminae and midribs as influenced by the chloride content of the irrigation water P. I. Orphanos Short Communications Pages: 287 - 290
Theoretical considerations in the comparison of total nitrogen difference and13N isotope dilution estimates of the contribution of nitrogen fixation to plant nutrition Segundo S. UrquiagaRobert M. Boddey Short Communications Pages: 291 - 294
Effect of salinity on translocation of assimilates in french bean V. N. BhivareP. D. Chavan Short Communications Pages: 295 - 297