Date: August 1, 2014
- Plan ahead: There’s less risk of manure or nutrient loss with 2 light manure applications (1 now, 1 later) than with 1 heavy application closer to the rainy season.
- Manure Spreading Advisory #2 (March 10, 2014) is still current: Adivsory #2
July’s Update was about the imbalance of nitrogen (N) to phosphorus (P) in manure relative to crop requirements. One strategy to address the imbalance is to use mineral N fertilizer to fulfill part of the crop requirement. Advantages of mineral N fertilizer over manure include:
- Particularly in cool and wet years, the N release from mineral fertilizer is more reliable
- Application is more even, ensuring all parts of a field receive enough N
- Unnecessary P additions can be avoided for soils with high amounts of soil test P
But if manure application is reduced, where would the unused manure go?
Scientists at Agassiz, BC have been looking at ways to answer this and better use the N and P in dairy manure (while reducing the need for starter phosphorus fertilizer).
VIDEO: Making the most of dairy slurry: the dual manure stream concept (24 minutes) http://goo.gl/Xv3hDj
Evaluation of the concept on commercial farms is still in the early stages. Stay tuned.
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 more information, contact BC Ministry of Agriculture
David Poon, P.Ag 604-556-3098
Geoff Hughes-Games, P.Ag 604-556-3102
For questions of a regulatory nature, contact BC Ministry of Environment
George Rushworth, P.Ag 604-582-5211