| Preface | p. 1 |
| Opening speech: Speech delivered at the opening ceremony of the international symposium on 'Fertilizers and Environment' | p. 3 |
| Opening lecture: Heavy metal contaminants in inorganic and organic fertilizers | p. 5 |
| The present situation of fertilizer production and use in the world | p. 13 |
| Higher and better yields with less environmental pollution in Egypt through balanced fertilizer use | p. 19 |
| Fertigation for minimizing environmental pollution by fertilizers | p. 23 |
| The agronomical and physiological efficiency of nitrogen applied for arable crops in Poland | p. 27 |
| Nitrogen balances in long-term field experiments | p. 31 |
| The effect of fertilizers on maize yield under two tillage systems | p. 39 |
| Effect of some nutrients on yield and composition of sugar beet grown in highly calcareous soil | p. 43 |
| Nitrogen losses and yield of cauliflower: Effect of the reduction of mineral nitrogen fertilization | p. 47 |
| The effect of calcium fertilization and liming on the soil improvement and grain yield of winter wheat, corn and soybean | p. 51 |
| Use of fertilizers in Russia is a factor of soil productivity | p. 55 |
| The fertilizer productive action and soil nutrient balance determination | p. 63 |
| Principles of forest fertilisation - illustrated by New Zealand experience | p. 65 |
| The effect of Al and Mn on growth and mineral composition of Casuarina equisetifolia Forst | p. 75 |
| Nutrient cycling and sustainability | p. 83 |
| Effect of different rates of N-fertilizers on nodulation, nodule activities and growth of two field grown cvs. of soybean | p. 89 |
| Impact of vesicular arbuscular mycorrhizal fungi and Rhizobium on the growth and P, N and Fe uptake by faba-bean | p. 95 |
| Fertilisation balances in two agriculturally used water catchment areas | p. 101 |
| Tillage (plowing, subsoiling and no-tillage) effect on soil erodibility: I. Runoff and infiltration | p. 109 |
| Tillage (plowing, subsoiling and no-tillage) effects on soil erodibility: II. Soil losses by runoff and "splash" | p. 115 |
| Effect of time and rate of nitrogen application on cotton | p. 121 |
| Stimulation of nodulation, nitrogen fixation and plant growth of faba bean by cobalt and copper additions | p. 127 |
| The role of inorganic fertilizers and their management practices | p. 131 |
| Suitability of North Carolina natural phosphate to Polish agriculture | p. 151 |
| Improvement of leguminous vegetables production in calcareous soil by addition of some acidifying materials | p. 155 |
| Nitrogen fertilization management in orchards to reconcile productivity and environmental aspects | p. 161 |
| Natural radioactivity in phosphate fertilizers | p. 171 |
| Coordinated phosphorus research within a network of six European institutions | p. 177 |
| Plant nutrient sulphur - a review of nutrient balance, environmental impact and fertilizers | p. 185 |
| Optimisation of nitrogen fertilisation | p. 195 |
| Plant biomass and fruit yield induction by Ti(IV) in P-stressed pepper crops | p. 199 |
| Improvement of the N fertilizer efficiency with dicyandiamide (dcd) in citrus trees | p. 205 |
| Effect of method of N-application and modified urea on N-15 recovery by rice | p. 211 |
| Response to NH[subscript 4][superscript +]-N fertilization of Xeric Torriorthent soils from middle Ebro basin (Spain) | p. 217 |
| Effect of different fertilization systems on variation of soil fertility in long-term trials | p. 223 |
| Effect of soil tillage and N-fertilization on the distribution of nitrate in the soil profile in a long-term wheat-maize biculture | p. 227 |
| Improvement of the nitrogen uptake induced by Ti(IV) supply in nitrogen stressed pepper crops | p. 233 |
| Effect of slow-release N-fertilizers on yield and baking quality of winter wheat | p. 237 |
| Effect of nitrogen fertilization and plant population on the yield of soybeans | p. 241 |
| The effect of fertilizers on incidence of the fungus: Microdochium bolleyi causing root rot of maize | p. 245 |
| Effect of irrigation systems and type of nitrogenous fertilizers in the grain yield and N-uptake on a maize crop | p. 249 |
| Environmental advantages and disadvantages of different sources of nitrogen in agricultural systems | p. 253 |
| Organic manure management and efficiency: Role of organic fertilizers and their management practices | p. 259 |
| Soil effects due to sewage sludge application in agriculture | p. 267 |
| Sub-surface injection of liquid waste | p. 275 |
| Reducing N losses (NH[subscript 3], N[subscript 2]O, N[subscript 2]) and immobilization from slurry through optimized application techniques | p. 283 |
| Agricultural use of sewage sludge and its regulation | p. 291 |
| Cotton fertilization with composts of (sugarbeet) vinasse and agricultural residues | p. 297 |
| The effect of a special organic amendment on the development of pepper plants cultivated in a soil infested with Verticillium dahliae | p. 301 |
| Evaluation of easily oxidizable organic matter in greenhouse soils through a biological technique | p. 305 |
| Experimental study on agricultural recycling of LD slag | p. 309 |
| Simultaneous use of pulp-mill sludge and poultry manure on rye-grass (Lolium multiflorum Lam.) fertilization | p. 317 |
| Leachates from a vermicomposting process. A possible new liquid fertilizer? | p. 323 |
| Tobacco-waste obtained from cigarette factories to be used as organic fertilizer | p. 327 |
| Response of barley to sewage sludge manuring and irrigation in calcareous soils | p. 331 |
| Study on nitrogen mineralization in municipal solid waste compost using electroultrafiltration | p. 337 |
| Stabilization of sludges from a dairy processing plant using vermicomposting | p. 341 |
| Cattle-slurry - [superscript 15]N turnover in a long-term lysimeter trial | p. 345 |
| An evaluation of three municipal solid wastes composts | p. 351 |
| Effect of agricultural practices on the nitrogen losses to the environment | p. 355 |
| Control of nitrate pollution by application of controlled release fertilizer (CRF), compost and an optimized irrigation system | p. 363 |
| Nitrogen losses by denitrification and leaching in grassland: the effect of cow slurry application | p. 369 |
| Considerations on main factors which take part in nitrate contamination of ground water in Spain with relationship to other EU countries | p. 375 |
| Phosphate enrichment in the sandy loam soils of West-Flanders, Belgium | p. 381 |
| Nitrogen and phosphorus losses from soils treated with suspension fertilizers by effect of water draining | p. 389 |
| Preliminary study of the effect of suspended particulate matter in the atmosphere on solar radiation in Salamanca (Spain) | p. 393 |
| Dynamics of nutrient transport in a small river of an agricultural water catchment in Northern Germany | p. 397 |
| Nitrogen leaching in a maize field trial of Lower Mondego Valley (Coimbra)-lysimeters studies | p. 401 |
| Aluminium phytotoxicity: a challenge for plant scientists | p. 405 |
| Towards zero accumulation of heavy metals in soils: an imperative or a fad? | p. 413 |
| Phytotoxicity of heavy metals | p. 423 |
| Heavy metal transfer in the food chain to humans | p. 431 |
| Dilution effect of plant biomass on plant cadmium concentration as induced by application of phosphate fertilizers | p. 437 |
| Thallium concentration in soils and crops and critical values with respect to food chain | p. 443 |
| Soil research on heavy metal pollution in a Belgian risk-bearing region with intensive agriculture | p. 449 |
| Effect of pyrite residue amendment on sulphur availability in a calcareous soil cropped with sown pasture | p. 453 |
| Estimating the flux of nitrate in a sandy loam soil under corn | p. 457 |
| Long term effects of wheat straw incorporation compared with burning on wheat yield and soil properties | p. 463 |
| Loads on soil due to agricultural activities in Hungary | p. 467 |
| The effects of pulp-mill sludge on leaching of mineral nitrogen | p. 471 |
| Alpechin as fertilizer: a new way to limit its phytotoxicity | p. 477 |
| Effect of cadmium concentration in the nutrient solution on lettuce growth | p. 481 |
| As and Se in soils and plants from abandoned mining areas of the Salamanca province, Spain | p. 485 |
| Incidence of heavy metals in the application of inorganic fertilizers to rice farming soils (Valencia, Spain) | p. 491 |
| Effect of fertilization and irrigation on the nickel content of peas and soybeans | p. 495 |
| The effect of N and P application on the Mn, Cu and Zn content of the winter wheat | p. 499 |
| Effect of cadmium on the distribution of micronutrients in Lactuca spp., maize and pea plants | p. 503 |
| Irrigation with urban wastewater. I. Yield and soil impact | p. 509 |
| City refuse compost as a source of micronutrients for plants | p. 517 |
| Agrochemical and technological characteristic features of sewage sludges applications in Russia | p. 523 |
| Residual effects of sugar beet vinasse on plant growth | p. 527 |
| Agricultural use of city refuse compost. I. Effect on growth and chemical composition of plants | p. 533 |
| Accumulation and transformation of heavy metals (HM) within the 'soil plants' system in prolonged agrochemical trials | p. 539 |
| Cadmium in inorganic fertilizers | p. 541 |
| Lead uptake and distribution in legume species grown on lead-enriched soils | p. 547 |
| Effect of different fertilization systems on soil contamination with heavy metals in long-term trials | p. 551 |
| EC policy regarding pollution of agricultural origin: the Nitrates Directive | p. 555 |
| Putting the concept of environmentally balanced fertilizer recommendations into practice on the farm | p. 561 |
| Code of best agricultural practices | p. 567 |
| Code of Good Agricultural Practice and water pollution | p. 569 |
| Subject index | p. 573 |
| Author index | p. 579 |
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