1. Soils and Landscapes, Manaaki Whenua – Landcare Research, Palmerston North, New Zealand
2. Soils and Landscapes, Manaaki Whenua – Landcare Research, Lincoln, New Zealand
3. Farm Systems and Environment, AgResearch, Hamilton, New Zealand
4. Farm Systems and Environment, AgResearch, Lincoln Research Centre, Lincoln, New Zealand
5. Department of Soil and Physical Sciences, Lincoln University, Lincoln, New Zealand