Date: May 1, 2015
Refer to Manure Spreading Advisory #2 of 2015 (April 1, 2015) for the current Advisory. The following Update does not change the Advisory.
Manure applications have an overall positive effect on soil biology. Many of the same creatures that live in soil can be found in manure: shredders (arthropods), decomposers (bacteria and fungi), and grazers and predators (nematodes and protozoa).
With excessive applications of liquid manure, there can be negative effects on soil biology: increased saturation of the soil, creating anaerobic conditions that increase rates of greenhouse gas emissions (nitrous oxide and methane), and decreasing soil life.
To promote positive effects of manure application on soil biology:
- Apply at rates to meet or approach crop requirements
- Spread manure evenly or apply more on areas requiring remediation (e.g. solid manure on eroded knolls)
- Use application methods to minimize soil surface disturbance
Reference: Ontario Ministry of Agriculture, Food, and Rural Affairs. 2005. Best Management Practices: Manure Management. http://www.omafra.gov.on.ca/english/environment/bmp/manure.htm
Producers are responsible for decisions regarding manure spreading. Legislation gives no specific dates for manure spreading but it does not allow for manure to be spread in a manner that causes pollution.
This Update is produced by government, in partnership with industry, to provide guidance to farmers regarding the Agricultural Waste Control Regulation and the ENVIRONMENTAL MANAGEMENT ACT. If a discrepancy arises between this document and the legislation, the legislation takes precedence. Following this advisory does not relieve anyone from their obligations under the LEGISLATION. The Province of British Columbia does not guarantee the accuracy or completeness of the information referenced here from legislation, and in no event is the Province liable or responsible for damages of any kind arising out of its use.
For general information on manure spreading, please contact the BC Ministry of Agriculture:
David Poon, P.Ag 604-556-3098
Geoff Hughes-Games, P.Ag 604-556-3102
Contact the BC Ministry of Environment:
Report a spill 1-800-663-3456
Report activities that are polluting the environment 1-877-952-7277 (Report All Poachers and Polluters RAPP)