1. Sulfate adsorption by variable charge soils: Effect of low-molecular-weight organic acids

   • C. E. Martinez
   • A. W. Kleinschmidt
   • M. A. Tabatabai

   ORIGINAL PAPER Pages: 157 - 163

2. Comparison of the difference method and 15N technique for studying the fate of nitrogen from plant residues in soil

   • T. A. Breland
   • S. Hansen

   ORIGINAL PAPER Pages: 164 - 168

3. Nitrogen uptake and growth of two citrus rootstock seedlings in a sandy soil receiving different controlled-release fertilizer sources

   • H. Dou
   • A. K. Alva

   ORIGINAL PAPER Pages: 169 - 172

4. Transformations of carbon and nitrogen during composting of animal manure and shredded paper

   • T. Paré
   • H. Dinel
   • S. Dumontet

   ORIGINAL PAPER Pages: 173 - 178

5. Forest soil community responses to plant growth-promoting rhizobacteria and spruce seedlings

   • M. Shishido
   • C. P. Chanway

   ORIGINAL PAPER Pages: 179 - 186

6. Pruning effect on nitrogen nutrient release in the root zone of Albizia lebbeck and Leucaena leucocephala

   • B. D. Kadiata
   • K. Mulongoy
   • B. Mambani

   ORIGINAL PAPER Pages: 187 - 193

7. Responses of Parkia biglobosa (Jacq.) Benth, Tamarindus indica L. and Zizyphus mauritiana Lam. to arbuscular mycorrhizal fungi in a phosphorus-deficient sandy soil

   • T. Guissou
   • A. M. Bâ
   • R. Duponnois

   ORIGINAL PAPER Pages: 194 - 198

8. Nitrous oxide emissions under different soil and land management conditions

   • C. Henault
   • X. Devis
   • J. C. Germon

   ORIGINAL PAPER Pages: 199 - 207

9. Biomass production and changes in soil productivity during longterm cultivation of Prosopis juliflora (Swartz) DC inoculated with VA mycorrhiza and Rhizobium spp. in a semi-arid wasteland

   • N. P. Bhatia
   • A. Adholeya
   • A. Sharma

   ORIGINAL PAPER Pages: 208 - 214

10. Earthworm feeding activity and development of the humus profile

    • N. Bernier

    ORIGINAL PAPER Pages: 215 - 223

11. N dynamics and sources of N2O production following pig slurry application to a loamy soil

    • L. Dendooven
    • E. Bonhomme
    • K. Vlassak

    ORIGINAL PAPER Pages: 224 - 228

12. Soil nitrogen availability as affected by fallow-maize systems on two soils in Kenya

    • J. B. Maroko
    • R. J. Buresh
    • P. C. Smithson

    ORIGINAL PAPER Pages: 229 - 234

13. Amino acid composition of soil organic matter

    • Z. N. Senwo
    • M. A. Tabatabai

    ORIGINAL PAPER Pages: 235 - 242

14. Spring dynamics of soil carbon, nitrogen, and microbial activity in earthworm middens in a no-till cornfield

    • S. Subler
    • A. S. Kirsch

    ORIGINAL PAPER Pages: 243 - 249

15. Density-dependent grazing on the extraradical hyphal network of the arbuscular mycorrhizal fungus, Glomus intraradices, by the collembolan, Folsomia candida

    • J. N. Klironomos
    • M. Ursic

    SHORT COMMUNICATION Pages: 250 - 253

16. Genetic diversity of fast-and slow-growing soybean rhizobia determined by random amplified polymorphic DNA analysis

    • C. C. Young
    • K. T. Cheng

    SHORT COMMUNICATION Pages: 254 - 256