1. Mechanics of root growth

   • A. R. Dexter

   OriginalPaper Pages: 303 - 312

2. Characteristics of rhizobia isolated from three legumes indigenous to the Canadian high arctic:Astragalus alpinus, Oxytropis maydelliana, andOxytropis arctobia

   • Danielle Prévost
   • L. M. Bordeleau
   • H. Antoun

   OriginalPaper Pages: 313 - 324

3. Increased growth response of plants induced by rhizobacteria antagonistic to soilborne pathogenic fungi

   • Y. Elad
   • I. Chet
   • R. Baker

   OriginalPaper Pages: 325 - 330

4. Evaluation of a soil test method and plant analysis for determing the sulphur status of alluvial soils

   • K. N. Bansal
   • A. R. Pal

   OriginalPaper Pages: 331 - 336

5. Use of chitin for controlling plant plant-parasitic nematodes

   • Y. Spiegel
   • I. Chet
   • E. Cohn

   OriginalPaper Pages: 337 - 345

6. Etude par le δ¹⁵N de l'influence du potassium sur la fixation symbiotique de l'azote chezTrifolium pratense

   • A. Chalamet
   • J. M. Audergon
   • A. M. Domenach

   OriginalPaper Pages: 347 - 352

7. Sensitivity of red clover rhizobia to soil acidity factors in pure culture and in symbiosis

   • Kristina Lindström
   • Heli Myllyniemi

   OriginalPaper Pages: 353 - 362

8. Nutrient variation in forest soil samples due to time of sampling and method of storage

   • Y. Lundell

   OriginalPaper Pages: 363 - 375

9. Response of plants to calcium concentration in flowing solution culture with chloride or sulphate as the counter-ion

   • A. K. M. S. Islam
   • C. J. Asher
   • D. G. Edwards

   OriginalPaper Pages: 377 - 395

10. Development of the root crown in some conifers

    • Evan R. C. Reynolds

    OriginalPaper Pages: 397 - 405

11. Effects of VA mycorrhiza on yield and harvest index of field-grown pea

    • I. Jakobsen

    OriginalPaper Pages: 407 - 415

12. Wheat and soil bromide dynamics after fumigation with methyl bromide in a mediterranean climate

    • A. Fransi
    • R. Pons
    • C. Bertran

    Short Communications Pages: 417 - 424

13. Nitrogen-fixing (acetylene-reducing) bacteria associated with ectomycorrhizae of Douglas-fir

    • C. Y. Li
    • L. L. Hung

    Short Communications Pages: 425 - 428

14. Plant-water relations in wheat as influenced by root pruning

    • R. B. Sharma

    Short Communications Pages: 429 - 432

15. Yield reductions in winter barley grown on a range of soils and exposed to simulated acid rain

    • T. W. Ashenden
    • Shirley Bell

    Short Communications Pages: 433 - 437

16. Incidence and pathogenicity ofFomes lignosus (Klotzch) bres. onTriplochiton scleroxylon K. Schum

    • E. R. Begho
    • E. J. A. Ekpo

    Short Communications Pages: 439 - 442

17. Effect of soil type on the damping-off of tomato seedlings caused bySclerotium rolfsii in the Nigerian savanna

    • R. Chima Wokocha

    Short Communications Pages: 443 - 444