1. Chemical testing procedures for poorly soluble P fertilizers used on acid leaching sands

   • D. M. Deeley
   • J. S. Yeates
   • R. J. Gilkes

   OriginalPaper Pages: 101 - 111

2. Calcium deficiency identified as an important factor limiting maize growth in acid ultisols of eastern Nigeria

   • B. O. Njoku
   • W. O. Enwezor
   • B. I. Onyenakwe

   OriginalPaper Pages: 113 - 123

3. Potential losses of fertilizer phosphorus by animal transfer

   • A. D. Mackay
   • J. K. Syers
   • P. E. H. Gregg

   OriginalPaper Pages: 125 - 134

4. Effect of nitrogen, phosphorus and soil and crop residues management practices on maize (Zea mays L.) yield in ultisol of eastern Cameroon

   • Nguyen Van Nguu

   OriginalPaper Pages: 135 - 142

5. Effect of liming on phosphate extracted by two soil-testing procedures

   • R. Naidu
   • R. W. Tillman
   • J. H. Kirkman

   OriginalPaper Pages: 143 - 152

6. Foliar fertilization of high-yielding peanuts during the pod-filling period

   • J. Halevy
   • A. Hartzook
   • T. Markovitz

   OriginalPaper Pages: 153 - 160

7. Characterizing the dissolution of phosphate rock materials by electro-ultrafiltration

   • A. D. Mackay
   • R. W. Tillman
   • P. E. H. Gregg

   OriginalPaper Pages: 161 - 171

8. Single superphosphate manufacture from Kakul phosphate rock

   • Muhammad Ishaque
   • Ishtiaq Ahmad

   OriginalPaper Pages: 173 - 180

9. Compaction of metal salt-urea complexes with triple superphosphate

   • S. H. Chien
   • C. B. Christianson
   • G. E. Peters

   OriginalPaper Pages: 181 - 191