Effect of potassium on the tolerance to PEG-induced water stress of two white clover varieties (Trifolium repens L.) C. RobinL. Shamsun-NoorA. Guckert OriginalPaper Pages: 153 - 158
Agronomic effectiveness of partially acidulated phosphate rock as influenced by soil phosphorus-fixing capacity S. H. ChienL. L. Hammond OriginalPaper Pages: 159 - 164
Effect of phosphorus on Azolla and its utilization in rice culture in Niger M. KondoM. KobayashiE. Takahashi OriginalPaper Pages: 165 - 170
15N-determined dinitrogen fixation potential of genetically diverse bean lines (Phaseolus vulgaris L.) P. A. A. PereiraR. H. BurrisF. A. Bliss OriginalPaper Pages: 171 - 179
Availability of phosphorus in a calcareous soil treated with rock phosphate or superphosphate as affected by phosphate-dissolving fungi H. M. SalihA. I. YahyaB. H. Munam OriginalPaper Pages: 181 - 185
A comparison of two methods and different media for isolatingFrankia from Casuarina root nodules P. A. RosbrookA. J. P. BurggraafP. Reddell OriginalPaper Pages: 187 - 193
Some properties of carbohydrate and C4-dicarboxylic acid utilization negative mutants ofRhizobium leguminosarum biovarphaseoli strain P121 P. J. LafontaineCarole LafrenièreH. Antoun OriginalPaper Pages: 195 - 201
Effect of deicing NaCl and CaCl2 on spruce (Picea abies (L.) sp.) J. BogemansL. NeirinckxJ. M. Stassart OriginalPaper Pages: 203 - 211
Colonization of the root zone ofAmmophila arenaria by harmful soil organisms W. H. Van der PuttenJ. T. Van Der Werf-Klein BretelerC. Van Dijk OriginalPaper Pages: 213 - 223
Effects of nitrogen amendment on annual plants in the Chihuahuan Desert H. T. MunW. G. Whitford OriginalPaper Pages: 225 - 231
Nitrogen-15 balances for urea and neem coated urea applied to lowland rice following two cowpea cropping systems P. S. JohnR. J. BureshT. T. Chua OriginalPaper Pages: 233 - 241
Critical evaluation of thein situ nitrate reductase assay J. F. SoussanaA. GojonP. Robin OriginalPaper Pages: 243 - 251
Calcium cycling in an oak-birch woodland on soils of varying CaCO3 content Th. PapeN. Van BreemenH. Van Oeveren OriginalPaper Pages: 253 - 261
Soil O2 and CO2 effects on root respiration of cacti P. S. NobelJ. A. Palta OriginalPaper Pages: 263 - 271
Inexpensive biological tests for soil calcium deficiency and aluminum toxicity K. D. RitcheyD. M. G. SousaGustavo Costa Rodrigues OriginalPaper Pages: 273 - 282
Potassium exchange behaviour in Carribean volcanic ash soils under banana cultivation S. FontaineB. DelvauxA. J. Herbillon OriginalPaper Pages: 283 - 290
Frankia-Alnus incana symbiosis: Effect of endophyte on nitrogen fixation and biomass production Assi WeberMervi-Leena SarsaVeronica Sundman OriginalPaper Pages: 291 - 297
The effect of different irrigation treatments on yield and quality of Verna lemon M. J. Sánchez BlancoA. TorrecillasF. del Amor Short Communications Pages: 299 - 302
Effect of solarization of soil within plastic bags on root rot of gerbera (Gerbera jamesonii L.) W. KaewruangK. SivasithamparamG. E. Hardy Short Communications Pages: 303 - 306
Effect of high rates of sulphur on the CaCO3 and CaSO4 content of calcareous soils Faik A. Dawood Short Communications Pages: 307 - 309