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Australasian Biometrics and New Zealand Statistical Association Joint Conference 2001
December 10-13, 2001
Park Royal Hotel
Christchurch, New Zealand

Organizers
David Baird, Dave Saville, Harold Henderson, Peter Johnstone, Marco Reale, Irene Hudson, Julian Visch, Roger Littlejohn

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The anatomy of dairy farm phosphorus loss
by
Murray Hannah
Natural Resources and Environment, Ellinbank
Coauthors: David Nash (Natural Resources and Environment, Ellinbank)

Nutrient loss from dairy farms is of obvious environmental concern. High levels of phosphorus and nitrogen in waterways interfere with normal stream ecology and, together with suitable light and temperature, set conditions conducive to toxic algal blooms. In addition, farmers would like to retain nutrients on farm for growing pasture.

As a first step to understanding how much, and by what processes, nutrients leave dairy farm paddocks, sites were established on commercial farms to monitor run-off generated by storms and irrigation. We examine data derived from these sites and develop a simple model to describe some of the major factors associated with phosphorus concentration in water leaving grazed paddocks.

Date received: August 24, 2001

Copyright © 2001 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cahg-25.