1. Phosphorus bioavailability of fertilizers: A predictive laboratory method for its evaluation

   • C. Morel
   • J. C. Fardeau

   OriginalPaper Pages: 1 - 9

2. Evaluation of two rock phosphates and a calcined rock phosphate as maintenance fertilizers for crop — pasture rotations in Western Australia

   • M. D. A. Bolland
   • R. J. Gilkes

   OriginalPaper Pages: 11 - 24

3. Effects of nitrogen fertilizer application methods on growth and acetylene reduction activity ofAzolla pinnata and yield of rice

   • A. B. Manna
   • P. K. Singh

   OriginalPaper Pages: 25 - 30

4. Investigations on crop responses to applied phosphorus in semi-arid vertisols of India

   • A. Chandra Sekhara Rao
   • I. V. Subba Rao

   OriginalPaper Pages: 31 - 40

5. Trends in fertilizer use and production in sub-Saharan Africa, 1970–95: An overview

   • B. L. Bumb

   OriginalPaper Pages: 41 - 48

6. Interaction of root distribution of corn with fertilizer placement and frequency of irrigation in lysimeters

   • A. Shaviv
   • J. Hagin

   OriginalPaper Pages: 49 - 54

7. Nitrogen-15 and sulfur-35 balances for fertilizers applied to transplanted rainfed lowland rice

   • A. Satrusajang
   • P. Snitwongse
   • D. K. Friesen

   OriginalPaper Pages: 55 - 65

8. Phosphate sorption approach for determining phosphorus requirements of wheat in calcareous soils

   • K. S. Memon
   • H. K. Puno
   • R. L. Fox

   OriginalPaper Pages: 67 - 72

9. A model to predict changes in soil moisture, NO₃-N content and N uptake by wheat

   • D. K. Benbi
   • S. S. Prihar
   • H. S. Cheema

   OriginalPaper Pages: 73 - 84

10. Influence of pH, time and rate of application on phosphate rock dissolution and availability to pastures

    • S. S. S. Rajan
    • R. L. Fox
    • M. Upsdell

    OriginalPaper Pages: 85 - 93

11. Influence of pH, time and rate of application on phosphate rock dissolution and availability to pastures

    • S. S. S. Rajan
    • R. L. Fox
    • W. M. H. Saunders

    OriginalPaper Pages: 95 - 101

12. Development of the potash fertilizer industry

    • B. C. Darst

    OriginalPaper Pages: 103 - 107

13. A particle analyser for measuring particle size distribution and shape, on-line or in the laboratory

    • T. Jørgensen

    OriginalPaper Pages: 109 - 114

14. Suspension quality and grade from commercial MAP

    • W. K. Rylant
    • O. E. Moore
    • R. G. Lee

    OriginalPaper Pages: 115 - 122

15. Sulfur coating of urea treated with attapulgite clay

    • L. L. Gullett
    • C. L. Simmons
    • R. G. Lee

    OriginalPaper Pages: 123 - 128