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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:
- Using neighboring or other
available manure storage facilities - 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:
- Identify lower-risk fields
for spreading or stacking manure: Apply to your driest
fields - Use your Nutrient
Management or Conservation Plan to find fields with: low slope, low erosion,
and low delivery
potential (low P-Index) - Apply to flatter fields
without channelized flow, gullies - Apply to fields farthest
from surface water, conduits to groundwater, and areas of concentrated flow - Apply to fields that do
not drain to Outstanding, Exceptional, or nutrient impaired water bodies
- Incorporate manure
applications whenever possible:
- Manure must be incorporated
within 200 feet of areas draining to groundwater conduits
- In winter, follow these
additional restrictions:
- No nutrient spreading in
the winter within 1000 feet of lakes and 300 feet from streams/rivers - 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
Principles:
- 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
occurs. - Fields receiving nutrients
must have sheet and rill soil erosion controlled to tolerable soil loss rates
or “T” over the crop rotation. - 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:
- Stop application
- Take corrective
action to prevent off-site movement (e.g., berms, dams, etc) - Modify application
(rate, method, depth, timing, field selected) to eliminate runoff - 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
(http://dnr.wi.gov/org/aw/rr/archives/pubs/RR687.pdf).
For additional information
regarding nutrient management planning, contact:
- Sue Porter, DATCP nutrient management specialist, 608-224-4605, or Sue.porter@wi.gov
- Stephanie Schneider, DATCP nutrient management specialist, 715-456-3168, or Stephanie.schneider@wi.gov
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