Manure Manager

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Spreading in high risk situations

May 31, 2011  by Wisconsin Manure Management Advisory System

May 31, 2011 – If you must
haul manure during high runoff risk times, follow these suggestions provided by the Wisconsin Manure Management Advisory Service..
May 31, 2011 – If you must
haul manure during high runoff risk times:

  • Avoid field spreading
    manure by:
  1. Using neighboring or other
    available manure storage facilities
  2. Creating in-field stacking
    in areas that pose the least environmental runoff risk. (For manure stacking
    guidelines, see page 14 of the NRCS 313 practice standard on Temporary,
    Unconfined Stacks of Manure.)
  • If field spreading of
    manure is necessary:
  1. Identify lower-risk fields
    for spreading or stacking manure: Apply to your driest
  2. Use your Nutrient
    Management or Conservation Plan to find fields with: low slope, low erosion,
    and low delivery
    potential (low P-Index)
  3. Apply to flatter fields
    without channelized flow, gullies
  4. Apply to fields farthest
    from surface water, conduits to groundwater, and areas of concentrated flow
  5. Apply to fields that do
    not drain to Outstanding, Exceptional, or nutrient impaired water bodies
  • Incorporate manure
    applications whenever possible:
  1. Manure must be incorporated
    within 200 feet of areas draining to groundwater conduits
  • In winter, follow these
    additional restrictions:
  1. No nutrient spreading in
    the winter within 1000 feet of lakes and 300 feet from streams/rivers
  2. On frozen or snow-covered
    fields with unincorporated liquid manure applications, limit application rates
    to 7,000 gallons/acre or the P removal of the next crop, whichever is less.
  • Core Nutrient Management
  1. Nutrient applications must
    not run off the intended application site so applications to saturated soil are
    likely to leave the field. Care should be exercised in the application of
    liquid manure. Liquid manure applications increase soil moisture, which can
    lower the amount of precipitation needed to induce runoff. Check field outlets
    (low spots or exit points) during and after application to verify no runoff
  2. Fields receiving nutrients
    must have sheet and rill soil erosion controlled to tolerable soil loss rates
    or “T” over the crop rotation.
  3. Establish grassed
    waterways in areas of concentrated flow, resulting in reoccurring gullies, and
    do not apply nutrients.
  • If runoff of applied
    nutrients occurs, implement following actions:
  1. Stop application
  2. Take corrective
    action to prevent off-site movement (e.g., berms, dams, etc)
  3. Modify application
    (rate, method, depth, timing, field selected) to eliminate runoff
  4. Notify WI DNR in
    the event of spill or accidental release of any material or substance when
    required by AG Spill Law (s.289.11, Wis Stats.) or terms of WPDES permit. Refer
    to AG spills and How to Handle Them

For additional information
regarding nutrient management planning, contact:

  • Sue Porter, DATCP nutrient management specialist, 608-224-4605, or
  • Stephanie Schneider, DATCP nutrient management specialist, 715-456-3168, or




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