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Nutrient Budgets for Three Mixed Farming Catchments in New Zealand

MAF Technical Paper No: 2002/17

Prepared for MAF Policy by : 
Ian Power 
Stewart Ledgard 
Ross Monaghan 
(AgResearch)

ISBN No: 0-478-07697-5 
ISSN No: 1171-4662

December 2002

Table of Contents

• Disclaimer
• Executive Summary
• 1. Introduction
• 2. Catchment Description
  • 2.1 Bog Burn
  • 2.2 Waikakahi Catchment
  • 2.3 Toenepi
• 3. Catchment Data
  • 3.1 Bog Burn
  • 3.2 Waikakahi
  • 3.3 Toenepi
• 4. The OVERSEER Nutrient Budget Model and Estimates of N Leaching
• 5. Catchment Nutrient Balances
  • 5.1 Bog Burn
    • 5.1.1 The effects of sheep and beef intensification
    • 5.1.2 The effects of dairy farm intensification
    • 5.1.3 The effects of dairy farm development
    • 5.1.4 The effects of integration of forage-cropping
    • 5.1.5 The effects of change in land use
  • 5.2 Waikakahi
    • 5.2.1 The effects of sheep and beef intensification
    • 5.2.2 The effects of dairy intensification
    • 5.2.3 The effects of dairy farm development
    • 5.2.4 The effects on dairy farm N budgets of poor soil drainage
    • 5.2.5 The effects of integration of cropping
    • 5.2.6 The effects of change in land use
  • 5.3 Toenepi
    • 5.3.1 The effects of sheep and beef intensification
    • 5.3.2 The effects of dairy farm intensification
    • 5.3.3 The effects of changes in dairy farm management
    • 5.3.4 The effects of integration of cropping
    • 5.3.5 The effects of change in land use
• 6 Discussion and Implications
  • 6.1 N leaching losses
  • 6.2 P and K surpluses
• 7. Acknowledgements
• 8. References
• Download as a PDF File [PDF  158K ]

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