1. Dissolution of phosphate rocks in soils. 2. Effect of pH on the dissolution and plant availability of phosphate rock in soil with pH dependent charge

   • N. S. Bolan
   • M. J. Hedley

   OriginalPaper Pages: 125 - 134

2. Evaluation of ammonium thiosulfate as a soil urease inhibitor

   • G. W. McCarty
   • J. M. Bremner
   • M. J. Krogmeier

   OriginalPaper Pages: 135 - 139

3. Evaluation of methods of measurement of nitrogen in poultry and animal manures

   • S. Mahimairaja
   • N. S. Bolan
   • A. N. Macgregor

   OriginalPaper Pages: 141 - 148

4. A discussion of the methods for comparing the relative effectiveness of phosphate fertilizers varying in solubility

   • S. H. Chien
   • P. W. G. Sale
   • D. K. Friesen

   OriginalPaper Pages: 149 - 157

5. Effects of residues of triple superphosphate on the quantity-intensity relationships of fresh phosphate in some soils from Brazil and Colombia

   • P. H. Le Mare
   • L. A. León

   OriginalPaper Pages: 159 - 166

6. Alfalfa response to lime, phosphorus, potassium, magnesium, and molybdenum on acid ultisols

   • J. L. Walworth
   • M. E. Sumner

   OriginalPaper Pages: 167 - 172

7. A simplified resin membrane technique for extracting phosphorus from soils

   • S. Saggar
   • M. J. Hedley
   • R. E. White

   OriginalPaper Pages: 173 - 180