1. Organic nitrogen compounds extracted from arable and forest soils by electro-ultrafiltration and recovery rates of amino acids

   • K. Németh
   • H. Bartels
   • K. Mengel

   OriginalPaper Pages: 271 - 275

2. Biodegradation of metolachlor in a soil perfusion experiment

   • S. -Y. Liu
   • R. Zhang
   • J. -M. Bollag

   OriginalPaper Pages: 276 - 281

3. A microcosm study on the respiration and weight loss in birch litter and raw humus as influenced by soil fauna

   • H. Setälä
   • J. Haimi
   • V. Huhta

   OriginalPaper Pages: 282 - 287

4. The hormone-like effect of earthworm casts on plant growth

   • U. Tomati
   • A. Grappelli
   • E. Galli

   OriginalPaper Pages: 288 - 294

5. Measurement of pH at the root surface of red clover (Trifolium pratense) grown in soils differing in proton buffer capacity

   • Rudolf Hauter
   • Konrad Mengel

   OriginalPaper Pages: 295 - 298

6. Biotoxicity and persistence of nonylphenol during incubation in a compost-sandstone mixture

   • M. Trocmé
   • J. Tarradellas
   • J-C. Védy

   OriginalPaper Pages: 299 - 303

7. Effects of animal manure and mineral fertilizer on the total carbon and nitrogen contents of soil size fractions

   • Bent T. Christensen

   OriginalPaper Pages: 304 - 307

8. Organic phosphorus compounds as a phosphorus source for higher plants through the activity of phosphatases produced by plant roots and microorganisms

   • J. C Tarafdar
   • N. Claassen

   OriginalPaper Pages: 308 - 312

9. Influence of phenamiphos on the vesicular-arbuscular mycorrhizal symbiosis in Leucaena leucocephala

   • M. Habte
   • A. Manjunath

   OriginalPaper Pages: 313 - 316

10. Effect of cellulose and straw incorporation in soil on total denitrification and nitrogen immobilization at initially aerobic and permanent anaerobic conditions

    • M. Gök
    • J. C. G. Ottow

    OriginalPaper Pages: 317 - 322

11. Axial pressures generated by the earthworm Aporrectodea rosea

    • B. M. McKenzie
    • A. R. Dexter

    OriginalPaper Pages: 323 - 327

12. Radial pressures generated by the earthworm Aporrectodea rosea

    • B. M. McKenzie
    • A. R. Dexter

    OriginalPaper Pages: 328 - 332

13. Vesicular-arbuscular mycorrhizal status of various crops in different agricultural soils of northern Greece

    • P. Jeffries
    • T. Spyropoulos
    • E. Vardavarkis

    OriginalPaper Pages: 333 - 337

14. Effect of phosphorus fertilization on blue-green algal inoculum production and nitrogen yield under field conditions

    • R. N. Bisoyi
    • P. K. Singh

    OriginalPaper Pages: 338 - 343

15. The effect of fertilisation on soil nitrifier activity in experimental grassland plots

    • D. W. Hopkins
    • A. G. O'Donnell
    • R. S. Shiel

    OriginalPaper Pages: 344 - 349

16. Physiological and symbiotic characteristics of Rhizobium fredii isolated from subtropical-tropical soils

    • C. C. Young
    • J. Y. Chang
    • C. C. Chao

    OriginalPaper Pages: 350 - 354