1. Phosphorus sorption capacity of low activity clay soils of South Western Nigeria and its usefulness in evaluating P requirement of rice

   • M. T. Adetunji

   OriginalPaper Pages: 181 - 188

2. Organic residue management, soil nutrient changes and maize yield in a humid Ultisol

   • M. T. Adetunji

   OriginalPaper Pages: 189 - 195

3. Nitrogen losses and fertilizer N use efficiency in irrigated porous soils

   • Milkha S. Aulakh
   • Bijay-Singh

   OriginalPaper Pages: 197 - 212

4. Towards a practical approach to fertilizer recommendations for food crop production in smallholder farms in Kenya

   • H. F. Schnier
   • H. Recke
   • A. W. Muriuki

   OriginalPaper Pages: 213 - 226

5. The bioconversion of tunisian phosphorite usingAspergillus niger

   • D. Bojinova
   • R. Velkova
   • St. Zhelev

   OriginalPaper Pages: 227 - 232

6. Potassium availability with application of sewage sludge, and sludge and manure composts in field experiments

   • Guang Wen
   • Julien P. Winter
   • Thomas E. Bates

   OriginalPaper Pages: 233 - 241

7. The value of poultry manure for wetland rice grown in rotation with wheat

   • Bijay-Singh
   • Yadvinder-Singh
   • O. P. Meelu

   OriginalPaper Pages: 243 - 250

8. Differential availability of partially sulphuric and phosphoric acidulated phosphate rocks I. Plant response

   • A. Ghani
   • S. S. S. Rajan

   OriginalPaper Pages: 251 - 259

9. Balanced pasture fertilization in the Basque Country: I. Phosphorus and potassium budgets on dairy farms

   • M. Oyanarte
   • G. Besga
   • A. G. Sinclair

   OriginalPaper Pages: 261 - 269

10. The effect of nitrogen source and crop rotation on the growth and yield of processing tomatoes

    • J. Cavero
    • R. E. Plant
    • D. B. Friedman

    OriginalPaper Pages: 271 - 282