1. Editorial

   EditorialNotes Pages: 1 - 1

2. Root growth, microbial activity and phosphatase activity in oil-contaminated, remediated and uncontaminated soils planted to barley and field pea

   • J. G. Xu
   • R. L. Johnson

   Research Article Pages: 3 - 10

3. The influence of nitrogen and potassium supply on the ammonium content of maize (Zea mays L.) leaves including a comparison of measurements made in vivo and in vitro

   • J. Gerendás
   • R. G. Ratcliffe
   • B. Sattelmacher

   Research Article Pages: 11 - 20

4. Iron toxicity and stress-induced ethylene production in rice leaves

   • M. Yamauchi
   • X. X. Peng

   Research Article Pages: 21 - 28

5. Interaction between barley and mixed cultures of nitrogen fixing and phosphate-solubilizing bacteria

   • A. A. Belimov
   • A. P. Kojemiakov
   • C. V. Chuvarliyeva

   Research Article Pages: 29 - 37

6. Influence of Norway spruce seedlings on the nutrient availability in mineral soil and forest floor material

   • Göran Hallsby

   Research Article Pages: 39 - 45

7. Nutrient accumulation and distribution of wheat genotypes in response to waterlogging and nutrient supply

   • Bingru Huang
   • Jerry W. Johnson
   • David C. Bridges

   Research Article Pages: 47 - 54

8. Sorghum, wheat and soybean production as affected by long-term tillage, crop sequence and N fertilization

   • A. J. Franzluebbers
   • F. M. Hons
   • V. A. Saladino

   Research Article Pages: 55 - 65

9. Liming induced stimulation of the amino acid metabolism in mycorrhizal roots of Norway spruce (Picea abies [L.] Karst.)

   • J. Dähne
   • D. Klingelhöfer
   • G. M. Rothe

   Research Article Pages: 67 - 77

10. Consequences of liming and gypsum top-dressing on nitrogen and carbon dynamics in acid forest soils with different humus forms

    • S. Belkacem
    • C. Nys

    Research Article Pages: 79 - 88

11. Aluminium/silicon interactions in barley (Hordeum vulgare L.) seedlings

    • Kim E. Hammond
    • David E. Evans
    • Martin J. Hodson

    Research Article Pages: 89 - 95

12. Dual inoculation with Aspergillus fumigatus and Glomus mosseae enhances biomass production and nutrient uptake in wheat (Triticum aestivum L.) supplied with organic phosphorus as Na-phytate

    • J. C. Tarafdar
    • H. Marschner

    Research Article Pages: 97 - 102

13. Influx and efflux of organic acids across the soil-root interface of Zea mays L. and its implications in rhizosphere C flow

    • David L. Jones
    • Peter R. Darrah

    Research Article Pages: 103 - 109

14. The effects of grazing and burning on soil and plant nutrient concentrations in Colombian páramo grasslands

    • Robert G. M. Hofstede

    Research Article Pages: 111 - 132

15. Effect of aluminium on yield and plant chemical concentrations of some temperate legumes

    • D. M. Wheeler
    • M. B. Dodd

    Research Article Pages: 133 - 145

16. Fine-root morphology and uptake of ³²P and ³⁵S in a Norway spruce (Picea abies (L.) Karst.) stand subjected to various nutrient and water supplies

    • Anna Clemensson-Lindell
    • Hakån Asp

    Research Article Pages: 147 - 155

17. In-situ root extent measurements by electrical capacitance methods

    • F. N. Dalton

    Research Article Pages: 157 - 165

18. Significance of nitrate leaching and long term N immobilization after deepening the plough layers for the N regime of arable soils in N.W. Germany

    • R. Nieder
    • K. C. Kersebaum
    • J. Richter

    Research Article Pages: 167 - 175

19. Erratum

    Research Article Pages: 177 - 177