1. Effects of plant residue quality, application rate, and placement method on phosphorus availability from Sokoto rock phosphate

   • O. O. Oladeji
   • G. O. Kolawole
   • G. Tian

   Original Paper 31 August 2006 Pages: 1 - 10

2. Effect of aging on the availability of zinc added to a calcareous clay soil

   • Y. B. Ma
   • N. C. Uren

   Original Paper 01 August 2006 Pages: 11 - 18

3. Foliar boron application affects lint and seed yield and improves seed quality of cotton grown on calcareous soils

   • Christos Dordas

   Original Paper 01 August 2006 Pages: 19 - 28

4. Long-term effects of inorganic fertilizers and manure on phosphorus reaction products in a Typic Ustochrept

   • Varinderpal-Singh
   • N.S. Dhillon
   • B.S. Brar

   Original Paper 30 August 2006 Pages: 29 - 37

5. Effect of cattle manure on selenate and selenite retention in soil

   • Anne Falk Øgaard
   • Trine A. Sogn
   • Susanne Eich-Greatorex

   Original Paper 18 August 2006 Pages: 39 - 48

6. Nitrogen inputs in ground and surface waters in the middle Mulde catchment

   • Ulrike Hirt

   Original Paper 30 August 2006 Pages: 49 - 65

7. Variations in grain nitrogen removal associated with management practices in maize production

   • B. L. Ma
   • K. D. Subedi
   • A. Liu

   Original Paper 18 August 2006 Pages: 67 - 80

8. Crop yield, nitrogen uptake and nitrate-nitrogen accumulation in soil as affected by 23 annual applications of fertilizer and manure in the rainfed region of Northwestern China

   • Sheng-Mao Yang
   • S. S. Malhi
   • Tian-Wen Guo

   Original Paper 30 August 2006 Pages: 81 - 94

9. Effect of incorporation of crop residues and organic manures on adsorption/desorption and bio-availability of phosphate

   • Varinderpal-Singh
   • N. S. Dhillon
   • B. S. Brar

   Original Paper 18 August 2006 Pages: 95 - 108