1. Cycling of nitrogen in modern agricultural systems

   • Thomas Rosswall
   • Keith Paustian

   Cycling of Nitrogen in Soil-Plant Systems Pages: 3 - 21

2. Nitrogen relationships in intensively managed temperate grasslands

   • P. Roger Ball
   • J. C. Ryden

   Cycling of Nitrogen in Soil-Plant Systems Pages: 23 - 33

3. Components of the nitrogen cycle measured for cropped and grassland soil-plant systems

   • J. H. Macduff
   • R. E. White

   Cycling of Nitrogen in Soil-Plant Systems Pages: 35 - 47

4. The uptake of soil and fertilizer-nitrogen by barley growing under Scottish climatic conditions

   • K. A. Smith
   • Ann E. Elmes
   • M. F. Franklin

   Cycling of Nitrogen in Soil-Plant Systems Pages: 49 - 57

5. Leaching losses of nitrogen from a clay soil under grass and cereal crops in Finland

   • Antti Jaakkola

   Cycling of Nitrogen in Soil-Plant Systems Pages: 59 - 66

6. Tillage effects on nitrogen uptake by maize from fine textured soils in the northwestern Corn Belt, USA

   • Alan Olness

   Cycling of Nitrogen in Soil-Plant Systems Pages: 67 - 73

7. The role of microorganisms in mediating and facilitating the uptake of plant nutrients from soil

   • P. B. Tinker

   Section 2: Microbial and Animal Effects on Soil Fertility Pages: 77 - 91

8. Earthworms and soil fertility

   • J. K. Syers
   • J. A. Springett

   Section 2: Microbial and Animal Effects on Soil Fertility Pages: 93 - 104

9. Effect of lime, phosphorus and mycorrhizal fungi on growth, nodulation and nitrogen fixation by white clover (Trifolium repens) grown in UK hill soils

   • Peter Newbould
   • Anne Rangeley

   Section 2: Microbial and Animal Effects on Soil Fertility Pages: 105 - 114

10. Effect of liming on spore germination, germ tube growth and root colonization by vesicular-arbuscular mycorrhizal fungi

    • J. O. Siqueira
    • D. H. Hubbell
    • A. W. Mahmud

    Section 2: Microbial and Animal Effects on Soil Fertility Pages: 115 - 124

11. Biological and biochemical analysis of soils

    • John Saville Waid

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 127 - 137

12. Extractable N and P in relation to microbial biomass in UK acid organic soils

    • B. L. Williams
    • G. P. Sparling

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 139 - 148

13. Mineralization dynamics in fallow dryland wheat plots, Colorado

    • E. T. Elliott
    • K. Horton
    • C. V. Cole

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 149 - 155

14. Dynamics of soil microbial biomass N under zero and shallow tillage for spring wheat, using¹⁵N urea

    • M. R. Carter
    • D. A. Rennie

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 157 - 164

15. Mineralization of C and N from microbial biomass in paddy soil

    • T. Marumoto

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 165 - 173

16. Influence of plant roots on C and P metabolism in soil

    • H. M. Helal
    • D. R. Sauerbeck

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 175 - 182

17. Response of soil microflora to moorland reclamation for improved agriculture

    • E. Maltby

    Section 3: Measurements of Microbial Populations and Biomass: Their Roles in Soil Processes Pages: 183 - 193

18. Anaerobic processes in soil

    • J. M. Tiedje
    • A. J. Sexstone
    • N. P. Revsbech

    Section 4: Anaerobic Processes in Soils and Gaseous Losses of Nitrogen Pages: 197 - 212

19. Denitrification in field soils

    • P. Colbourn
    • R. J. Dowdell

    Section 4: Anaerobic Processes in Soils and Gaseous Losses of Nitrogen Pages: 213 - 226

20. Total denitrification and the ratio between N₂O and N₂ during the growth of spring barley

    • Finn P. Vinther

    Section 4: Anaerobic Processes in Soils and Gaseous Losses of Nitrogen Pages: 227 - 232

21. Nitrite: a key compound in N loss processes under acid conditions?

    • O. Van Cleemput
    • L. Baert

    Section 4: Anaerobic Processes in Soils and Gaseous Losses of Nitrogen Pages: 233 - 241

22. The biological transformation of P in soil

    • K. R. Tate

    Section 5: Dynamics and Models of Organic Carbon, Nitrogen and Phosphorus Transformations in Cultivated Soils Pages: 245 - 256

23. Modelling C and N turnover through the microbial biomass in soil

    • J. A. Van Veen
    • J. N. Ladd
    • M. J. Frissel

    Section 5: Dynamics and Models of Organic Carbon, Nitrogen and Phosphorus Transformations in Cultivated Soils Pages: 257 - 274

24. Dynamics of organic matter in soils

    • E. A. Paul

    Section 5: Dynamics and Models of Organic Carbon, Nitrogen and Phosphorus Transformations in Cultivated Soils Pages: 275 - 285

25. Concepts of soil organic matter transformations in relation to organo-mineral particle size fractions

    • H. Tiessen
    • J. W. B. Stewart
    • H. W. Hunt

    Section 5: Dynamics and Models of Organic Carbon, Nitrogen and Phosphorus Transformations in Cultivated Soils Pages: 287 - 295

26. A simple method for calculating decomposition and accumulation of ‘young’ soil organic matter

    • B. H. Janssen

    Section 5: Dynamics and Models of Organic Carbon, Nitrogen and Phosphorus Transformations in Cultivated Soils Pages: 297 - 304

27. Interactions between biological processes, cultivation and soil structure

    • J. M. Lynch

    Section 6: Interaction Effects of Organisms, Organic Matter and Management on Soil Structure Pages: 307 - 318

28. Soil organic matter and structural stability: mechanisms and implications for management

    • J. M. Oades

    Section 6: Interaction Effects of Organisms, Organic Matter and Management on Soil Structure Pages: 319 - 337

29. Influence of soil type, crop and air drying on residual carbohydrate content and aggregate stability after treatment with periodate and tetraborate

    • M. V. Cheshire
    • G. P. Sparling
    • C. M. Mundie

    Section 6: Interaction Effects of Organisms, Organic Matter and Management on Soil Structure Pages: 339 - 347

30. Changes in soil structure and biological activity on some meadow hay plots at Cockle Park, Northumberland

    • R. S. Shiel
    • D. L. Rimmer

    Section 6: Interaction Effects of Organisms, Organic Matter and Management on Soil Structure Pages: 349 - 356

31. The effects on topsoil of long-term storage in stockpiles

    • A. W. Abdul-Kareem
    • S. G. McRae

    Section 6: Interaction Effects of Organisms, Organic Matter and Management on Soil Structure Pages: 357 - 363

32. Effects of pesticides and heavy metals on biological processes in soil

    • Klaus H. Domsch

    Section 7: Effects of Noxious Material on Biological Processes in Soils Pages: 367 - 378

33. Microbial populations in trifluralin-treated soil

    • B. M. Olson
    • R. B. McKercher
    • J. J. Germida

    Section 7: Effects of Noxious Material on Biological Processes in Soils Pages: 379 - 387

34. Chemical disinfestation and metabolic integrity of soil

    • H. G. Van Faassen
    • G. Lebbink

    Section 7: Effects of Noxious Material on Biological Processes in Soils Pages: 389 - 400