Advisories

  • May UPDATE to Manure Spreading Advisory #2 2014: South Coast Region

    Do you know the nitrogen (N) fertilizer value of manure?

    • Example: A farmer broadcasts 45,000 L per hectare (4,000 imperial gallons per acre) of liquid manure in the spring. The N fertilizer value of this manure, in the year of application, depends largely on the total N and ammonium-N contents of the manure:

    Manure
    (% total N, % ammonium-N)

    Equivalent N amount (kg/ha)

    Value at $1.25/kg N

    Value at $1.50/kg N

    Dairy, liquid (0.13% N, 0.07% NH4-N)

    25

    $31/hectare

    $38/hectare

    Dairy, slurry (0.28% N, 0.15% NH4-N)

    40

    $50/hectare

    $60/hectare

    Hog, liquid (0.35% N, 0.26% NH4-N)

    70

    $88/hectare

    $105/hectare

    Your manure (?)

    ?

    ?

    ?

    Manure

    (% total N, % ammonium-N)

    Equivalent N amount (lb/ac)

    Value at $0.57/lb N

    Value at $0.68/lb N

    Dairy, liquid (0.13% N, 0.07% NH4-N)

    22

    $13/acre

    $15/acre

    Dairy, slurry (0.28% N, 0.15% NH4-N)

    36

    $20/acre

    $24/acre

    Hog, liquid (0.35% N, 0.26% NH4-N)

    62

    $36/acre

    $43/acre

    Your manure (?)

    ?

    ?

    ?

    See the next page for the assumptions about N losses and availability.

    •  Reliable estimates come from analyses of your manure (see the April 1 Update).

    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 further information, please 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: BC Ministry of Environment
    George Rushworth, P.Ag 604-582-5211

    Assumptions used to estimate equivalent fertilizer nitrogen (N) amounts (see above)

    • Application of manure at 45,000 L per hectare (4,000 imperial gallons per acre)
    • Total N and ammonium (NH4) N contents on an as-received basis o Dairy, liquid (98% water): 0.13% N; 0.07% NH4-N o Dairy, slurry (94% water): 0.28% N; 0.15% NH4-N o Hog (96% water): 0.35% N; 0.26% NH4-N o Actual values vary from farm to farm
    • Ammonia (NH3) loss: percentage of NH4 lost to the air was estimated using the Ammonia Loss calculator (https://www.farmwest.com/climate/ammonia) with the following assumptions:: o Broadcast by splashplate with no incorporation, at an air temperature of 10°C and no wind o Dairy, liquid (98% water): 43% loss of NH4 o Dairy, slurry (94% water): 62% loss of NH4 o Hog (96% water): 49% loss of NH4
    • Mineralization: 25% of the organic N transforms into plant-available form in the year of application. In manure, organic N is Total N minus NH4-N. Additional notes
    • The above excludes the N value of manure in the 2nd and 3rd year after manure application. The N is temporarily stored in soil organic N and released in the 2nd and 3rd years.
    • The value of phosphorus (P) or potassium (K) in manure depends on P or K levels in the receiving soil: the greater the soil test P or K, the less is the value of the manure P or K in general.
    Filed under: 
  • April UPDATE to Manure Spreading Advisory #2 2014: South Coast Region

    April 1, 2014

    Do you know the nutrient content of your manure?

    • You can find a lab that will analyze your farm’s manure for total nutrient contents that will vary somewhat from the averages (Table 1). Find a list of laboratories here: http://goo.gl/ntuZqP
    • A fraction of the total nutrients has fertilizer value in the year of application, particularly in the case of nitrogen. Another fraction has fertilizer value in subsequent years. For general information about how large the fractions are, see Question 4 in the Q & A document here (http://goo.gl/rqdEjz).

    Table 1. Average nutrient contents (% as-received) of some manures. The Ministry of Agriculture and its partners are currently updating these values with local data to provide better reference information.

    Manure Type

    Total Nitrogen (N)
    (%)

    Total Phosphorus (P)
    (%)

    Total Potassium (K)
    (%)

    Liquid dairy >98% water (very watery)

    0.13

    0.02

    0.12

    Liquid dairy 95-98% water (quite watery)

    0.20

    0.04

    0.16

    Broiler 25% water

    3.47

    1.09

    1.29

    Hog 93% water (covered pit)

    0.63

    0.14

    0.33

    Hog 98% water (uncovered pit)

    0.35

    0.07

    0.14

     

    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 further information, please 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:  BC Ministry of Environment
    George Rushworth, P.Ag                                604-582-5211

    Filed under: 
  • Manure Spreading Advisory #2 for 2014: South Coast Region

    March 10, 2014

    • Well-planned manner applications are acceptable on most fields that are seeded, will be seeded within two weeks, or have well-established grasses.
    • Do not apply manure prior to significant rain events to avoid nutrient runoff and leaching. Please check your local weather forecast and see the next page for more information.
    • Avoid manure applications on wet areas or saturated soils. Some fields will dry more quickly than others.
    • Please continue to check you have enough manure storage to hold the average expected precipitation plus any excessive precipitation.
    • Field-stored solid agricultural wastes (except agricultural vegetation waste) MUST be COVERED from October 1 to April 1, inclusive.

    Please read the entire advisory for details and important information to assist in the decision-making process for manure application(s) and storage.

    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 further information, please 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: BC Ministry of Environment
    George Rushworth, P.Ag. 604-582-5211

    Additional Information

    Manure Storage

    • Develop a contingency plan to outline an effective response in case of an emergency. The plan could include identification of nearby abandoned pits, contact information for vacuum trucks, and easy access to the provincial spill reporting hotline. • A review of beneficial management practices (such as those found in the Environmental Farm Plan Reference Guide) may help identify improved management practices to alleviate storage issues.

    Established Grasses

    • Manure may be applied throughout the growing season to meet crop nutrient uptake.
    • Avoid spreading on wet fields and saturated soils.
    • Plan manure applications to ensure that storage facilities will be as close to empty as possible by next October.
    • Do not apply manure within 5 meters or more of wet ditches or watercourses. Increase buffer width to avoid any contaminated runoff based on soil, soil cover conditions, slopes greater than 5%, and sensitivity of the area being protected.

    Berry and Vegetable Crops

    • Do not spread manure on berry fields between flowering and harvest or on vegetable fields after planting.
    • The use of properly composted manure should be considered if food safety issues related to manure applications are a concern and/or if nutrient leaching is a concern in sensitive areas such as unconfined aquifers.
    • Verify your food safety plan or program requirements prior to manure and/or compost applications.

    Bare Fields and Fields Prior to Planting

    • Manure applications are not recommended unless the field will be seeded within two weeks of manure application.

    Additional Resources

    Filed under: 
  • March UPDATE to Manure Spreading Advisory #1 2014: South Coast Region

    Update to Manure Spreading Advisory #1 2014: South Coast Region Date: March 3, 2014

      • In general, manure application is not advised this week.
      • Cold temperatures and snow or rain over the past weekend have delayed the start of acceptable conditions for manure spreading in most parts of the South Coast.
      • Without adequate drainage, finer-textured soils (e.g. clays and loams) are more likely to be wet, have surface runoff, warm up slowly, and be compacted than coarse-textured (sandy) soils, if all else is the same.
      • Expect the next Manure Spreading Advisory to be released next week when weather and soil conditions improve.
      • See http://www.agf.gov.bc.ca/resmgmt/ManureAdvisory/index.htm for the most current information. 

     

    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 further information, please 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: BC Ministry of Environment George Rushworth, P.Ag 604-582-5211

    Filed under: