1. Boswell , C. C. 1997a. “Developing a monitoring protocol for land sustainability in South Island high country farming systems”. 25Private Bag, Mosgiel, New Zealand: Invermay Agricultural Centre. Unpublished AgResearch internal report held at
2. Dryland lucerne responses to elemental sulphur of different particle sizes applied at different rates and frequencies in North Otago, New Zealand
3. Boswell , C. C. Jarvis , P. J. and Hutchinson , G. K. 1998. “Summary and analysis of monitoring databases and programmes for sustainable land management with special reference to tussock grasslands”. 67Private Bag, Mosgiel, New Zealand: Invermay Agricultural Centre. Unpublished AgResearch internal report held at