1. Preface

   • Encarna Velázquez Pérez
   • Claudino Rodríguez Barrueco

   OriginalPaper 19 September 2006 Pages: 1 - 1

2. The taxonomy of rhizobia: an overview

   • Anne Willems

   OriginalPaper 24 August 2006 Pages: 3 - 14

3. Genetics of phosphate solubilization and its potential applications for improving plant growth-promoting bacteria

   • H. Rodríguez
   • R. Fraga
   • Y. Bashan

   OriginalPaper 19 September 2006 Pages: 15 - 21

4. Biodiversity of populations of phosphate solubilizing rhizobia that nodulates chickpea in different Spanish soils

   • R. Rivas
   • A. Peix
   • E. Velázquez

   Original Paper 21 September 2006 Pages: 23 - 33

5. Phosphate solubilization activity of rhizobia native to Iranian soils

   • H.A. Alikhani
   • N. Saleh-Rastin
   • H. Antoun

   Original Paper 24 August 2006 Pages: 35 - 41

6. Differential effects of coinoculations with Pseudomonas jessenii PS06 (a phosphate-solubilizing bacterium) and Mesorhizobium ciceri C-2/2 strains on the growth and seed yield of chickpea under greenhouse and field conditions

   • Angel Valverde
   • Araceli Burgos
   • José-Mariano Igual

   OriginalPaper 24 August 2006 Pages: 43 - 50

7. Effect of Tilemsi phosphate rock-solubilizing microorganisms on phosphorus uptake and yield of field-grown wheat (Triticum aestivum L.) in Mali

   • A. H. Babana
   • H. Antoun

   OriginalPaper 24 August 2006 Pages: 51 - 58

8. Screening for PGPR to improve growth of Cistus ladanifer seedlings for reforestation of degraded mediterranean ecosystems

   • Ramos Solano B.
   • M. T. Pereyra de la Iglesia
   • F. J. Gutierrez Mañero

   OriginalPaper 19 September 2006 Pages: 59 - 68

9. Phosphate-solubilizing microorganisms isolated from rhizospheric and bulk soils of colonizer plants at an abandoned rock phosphate mine

   • I. Reyes
   • A. Valery
   • Z. Valduz

   OriginalPaper 24 August 2006 Pages: 69 - 75

10. Microbial solubilization of rock phosphate on media containing agro-industrial wastes and effect of the resulting products on plant growth and P uptake

    • N. Vassilev
    • A. Medina
    • M. Vassileva

    OriginalPaper 24 August 2006 Pages: 77 - 84

11. The dependence of soil microbial activity on recent photosynthate from trees

    • S. G. Göttlicher
    • K. Steinmann
    • P. Högberg

    Research Article 02 August 2006 Pages: 85 - 94

12. Soil microbial loop and nutrient uptake by plants: a test using a coupled C:N model of plant–microbial interactions

    • Xavier Raynaud
    • Jean-Christophe Lata
    • Paul W. Leadley

    ORIGINAL PAPER 09 September 2006 Pages: 95 - 116

13. Genotypic Variation in Root Growth Angle in Rice (Oryza sativa L.) and its Association with Deep Root Development in Upland Fields with Different Water Regimes

    • Yoichiro Kato
    • Jun Abe
    • Junko Yamagishi

    Original Paper 09 September 2006 Pages: 117 - 129

14. Litter N:P ratios indicate whether N or P limits the decomposability of graminoid leaf litter

    • Sabine Güsewell
    • Jos T. A. Verhoeven

    ORIGINAL PAPER 15 August 2006 Pages: 131 - 143

15. Physiological and Molecular Responses of Nitrogen-starved Rice Plants to Re-supply of Different Nitrogen Sources

    • Baozhen Li
    • Weijie Xin
    • Guohua Xu

    Original Paper 15 August 2006 Pages: 145 - 159

16. Seasonal and spatial variability of soil respiration in four Sitka spruce stands

    • Gustavo Saiz
    • Carly Green
    • Edward P. Farrell

    Original Paper 15 August 2006 Pages: 161 - 176

17. Genetic structure and activity of the nitrate-reducers community in the rhizosphere of different cultivars of maize

    • Laurent Philippot
    • Melanie Kuffner
    • F. Martin-Laurent

    Original Paper 15 August 2006 Pages: 177 - 186

18. Utilization of bedrock water by Brosimum alicastrum trees growing on shallow soil atop limestone in a dry tropical climate

    • José Ignacio Querejeta
    • Héctor Estrada-Medina
    • Rocío Ruenes

    Original Paper 24 August 2006 Pages: 187 - 197

19. High diversity of diazotrophic bacteria associated with the carnivorous plant Drosera villosa var. villosa growing in oligotrophic habitats in Brazil

    • U. Albino
    • D. P. Saridakis
    • G. Andrade

    Original Paper 24 August 2006 Pages: 199 - 207

20. Different native arbuscular mycorrhizal fungi influence the coexistence of two plant species in a highly alkaline anthropogenic sediment

    • Rui S. Oliveira
    • Paula M. L. Castro
    • Miroslav Vosátka

    Original Paper 24 August 2006 Pages: 209 - 221

21. Phytosiderophores released by graminaceous species promote ⁵⁹Fe-uptake in citrus

    • Stefano Cesco
    • Adamo Domenico Rombolà
    • Roberto Pinton

    Original paper 24 August 2006 Pages: 223 - 233

22. Simulating trends in crop yield and soil carbon in a long-term experiment—effects of rising CO₂, N deposition and improved cultivation

    • J. Berntsen
    • B. M. Petersen
    • J. E. Olesen

    Original Paper 24 August 2006 Pages: 235 - 245

23. Cluster-root formation, carboxylate exudation and proton release of Lupinus pilosus Murr. as affected by medium pH and P deficiency

    • Z. Wang
    • J. Shen
    • F. Zhang

    Original Paper 24 August 2006 Pages: 247 - 256

24. Charcoal and shrubs modify soil processes in ponderosa pine forests of western Montana

    • M. D. MacKenzie
    • T. H. DeLuca

    Original Paper 24 August 2006 Pages: 257 - 266

25. Cadmium-induced ammonium ion accumulation of rice seedlings at high temperature is mediated through abscisic acid

    • Yi Ting Hsu
    • Mei Chun Kuo
    • Ching Huei Kao

    Original Paper 24 August 2006 Pages: 267 - 277

26. Effects of forest management on soil N cycling in beech forests stocking on calcareous soils

    • Michael Dannenmann
    • Rainer Gasche
    • Hans Papen

    Original Paper 31 August 2006 Pages: 279 - 300

27. Fate of carbon in upland grassland subjected to liming using in situ ¹³CO₂ pulse-labelling

    • Bente Foereid
    • Lorna A. Dawson
    • J. Ignacio Rangel-Castro

    Original Paper 24 August 2006 Pages: 301 - 311

28. Phytoavailability of zirconium in relation to its initial added form and soil characteristics

    • E. Ferrand
    • C. Dumat
    • M. F. Benedetti

    Original Paper 21 September 2006 Pages: 313 - 325

29. Cotton–cowpea intercropping and its N₂ fixation capacity improves yield of a subsequent maize crop under Zimbabwean rain-fed conditions

    • L. Rusinamhodzi
    • H. K. Murwira
    • J. Nyamangara

    Original Paper 24 August 2006 Pages: 327 - 336

30. Short-term and long-term effects of tannins on nitrogen mineralisation and litter decomposition in kauri (Agathis australis (D. Don) Lindl.) forests

    • Eric Verkaik
    • Anne G. Jongkind
    • Frank Berendse

    Original paper 24 August 2006 Pages: 337 - 345

31. Soil water, nutrient availability and sapling survival under organic and polyethylene mulch in a seasonally dry tropical forest

    • M. G. Barajas-Guzmán
    • J. Campo
    • V. L. Barradas

    Original paper 24 August 2006 Pages: 347 - 357

32. Effects, distribution and uptake of silicon in banana (Musa spp.) under controlled conditions

    • C. Henriet
    • X. Draye
    • B. Delvaux

    Original Paper 24 August 2006 Pages: 359 - 374

33. QTL Analysis of Aluminum Resistance in Rice (Oryza sativa L.)

    • Y. Xue
    • J. M. Wan
    • J. F. Ma

    Original Paper 24 August 2006 Pages: 375 - 383