dairy-effluent

The manure production data is calculated from the number of dairy cattle – Cows in milk and dry, for the 2015-16 statistical area 2 (SA2) level, From the ABS 2015/16 rurual commodities data. LGA’s with less than 45 cows were excluded from the analysis. The equation used to calculate dairy manure production is,

Manure wet weight (t/week) = 5.72 (kg/day collected in the dairy) x number of dairy cattle x 7/1000

Manure calculations are based on the 2015-2016 average milk production of 6512kg/cow/yr from the Diary Australia website. Total excreta (feaces+urine) (kg day) was calculated using the Nennich et al (2005) equation to produce an average manure production of 57 kg per day per animal. An average of 10% of this figure is assumed to be deposited in the dairy. The Dairy Australia publication 'Effluent and Manure Management Database for the Australian Dairy Industry' is a key source for the average manure production.This document can be found on the Dairy Australia website or via this link.

http://www.dairyclimatetoolkit.com.au/~/media/climatetoolkit/reports/da%202008%20effluent%20and%20manure%20mgt%20database.pdf

ABS data, creative commons statement, copyright and disclaimers can be viewed at,

http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/7121.02010-11?OpenDocument

The core 2015/16 ABS rural commodities data (SA2) can be sourced at,

http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/7121.02015-16?OpenDocument

DISCLAIMER: While all reasonable care has been taken in the preparation of the material in this file, the Western Australian Government and its officers accept no responsibility for any errors or omissions it may contain, whether caused by negligence, or otherwise, or for any loss, however caused, sustained by any person who relies on it. Copyright © Department of Primary Industries and Regional Development, 2017