1. Effects of length of forest fallow on fertility dynamics in a Mexican ultisol

   • G. Wadsworth
   • H. M. Reisenauer
   • M. J. Singer

   OriginalPaper Pages: 151 - 156

2. Interactions among nitrogen-transforming bacteria and nitrogen-fixingPisum sativum L. in laboratory sand columns

   • Russell K. Hynes
   • Louise M. Nelson

   OriginalPaper Pages: 157 - 167

3. Estimating the chemical compositions of soil solutions by obtaining saturation extracts or specific 1:2 by volume extracts

   • C. Sonneveld
   • J. Van den Ende
   • S. S. De Bes

   OriginalPaper Pages: 169 - 175

4. Response of seeds ofLupinus termis andVicia faba to the interactive effect of salinity and ascorbic acid or pyridoxine

   • M. A. Shaddad
   • A. F. Radi
   • M. M. Azooz

   OriginalPaper Pages: 177 - 183

5. Physico-chemical characteristics of humic substances of major soil associations of Bihar (India)

   • B. Mishra
   • L. L. Srivastava

   OriginalPaper Pages: 185 - 191

6. Temperature-dependent nitrogen transformations in acid oak-beech forest litter in the Netherlands

   • I. M. Emmer
   • A. Tietema

   OriginalPaper Pages: 193 - 196

7. The effect of moisture on the decomposition rate of cattle manure

   • H. K. Murwira
   • H. Kirchmann
   • M. J. Swift

   OriginalPaper Pages: 197 - 199

8. MULTCOMP: A computer program for preparation and chemical speciation of multicomponent saline solutions

   • T. M. Abu-Sharar
   • M. B. Zughul

   OriginalPaper Pages: 201 - 206

9. Growth and nitrogen fixation ofAzolla pinnata andAzolla caroliniana as affected by urea fertilizer and their influence on rice yield

   • A. B. Manna
   • P. K. Singh

   OriginalPaper Pages: 207 - 212

10. Mycorrhizal dependence of four crops in a P-sorbing soil

    • J. Krikun
    • J. H. Haas
    • R. Kinsbursky

    OriginalPaper Pages: 213 - 217

11. Response ofZea mays andLycopersicon esculentum to the ethylene precursors, L-methionine and L-ethionine applied to soil

    • Muhammad Arshad
    • W. T. Frankenberger

    OriginalPaper Pages: 219 - 227

12. The management of populations of vesicular-arbuscular mycorrhizal fungi in acid-infertile soils of a savanna ecosystem

    • J. C. Dodd
    • I. Arias
    • D. S. Hayman

    OriginalPaper Pages: 229 - 240

13. The management of populations of vesicular-arbuscular mycorrhizal fungi in acid-infertile soils of a savanna ecosystem

    • J. C. Dodd
    • I. Arias
    • D. S. Hayman

    OriginalPaper Pages: 241 - 247

14. Growth and nodulation of tropical food legumes in dilute solution culture

    • R. W. Bell
    • D. G. Edwards
    • C. J. Asher

    OriginalPaper Pages: 249 - 258

15. Growth promotion of maize by legume soils

    • A. Fyson
    • A. Oaks

    OriginalPaper Pages: 259 - 266

16. Prediction of fertilizer phosphate requirement using the Langmuir adsorption maximum

    • Ahmed A. Mehadi
    • Robert W. Taylor
    • James W. Shuford

    OriginalPaper Pages: 267 - 270

17. Comparison of two serpentine species with different nickel tolerance strategies

    • Poberto Gabbrielli
    • T. Pandolfini
    • M. R. Palandri

    OriginalPaper Pages: 271 - 277

18. Rapid bioassay of aluminum toxicity in soil

    • J. L. Ahlrichs
    • M. C. Karr
    • R. J. Wright

    OriginalPaper Pages: 279 - 285

19. The effects of nitrate:ammonium ratios and nitrapyrin on the nitrogen response ofZea mays L. under field conditions

    • F. G. Adriaanse
    • J. J. Human

    OriginalPaper Pages: 287 - 293

20. Spectral reflectance ratio of rice canopy for estimating crop nitrogen status

    • M. Takebe
    • T. Yoneyama
    • T. Murakami

    Short Communication Pages: 295 - 297

21. The nature of the interference potential ofPluchea lanceolata (DC) C B Clarke (Asteraceae)

    • Inderjit
    • K. M. M. Dakshini

    Short Communication Pages: 298 - 302

22. Erratum

    • M. J. Sánchez-Blanco
    • A. Torrecillas
    • F. del Amor

    Erratum Pages: 303 - 303