Need to spread on a high-risk day?

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Contact Nichole Embertson at (360) 526-2381 x 126 for guidance on high risk manure spreading activities.

Need to spread manure on a high risk day? Follow the current guidance:

If you need to apply manure during a high risk time (after October 31, early season, lagoon is on verge of breech, etc.), follow the guidance below. If you do not have any low risk fields to go to, find a neighboring field that is appropriate or haul manure to an additional storage lagoon.

  1. Check the Manure Spreading Advisory - The MSA shows the current runoff risk associated with manure application and can help you identify the most appropriate day to apply. If the risk is high, but you still need to apply today rather than have a lagoon breach, follow the following steps.

  2. Identify your low risk fields to apply to - Apply only to low risk fields during high risk times. Your low risk fields are identified on your risk management map in your Nutrient Management Plan. Haven't had a field risk assessment? Not sure what your low risk fields are? Contact your planner at WCD to have a field risk assessment done today to identify those fields that are appropriate for application during high risk times. Typically, low risk fields are those that do not have a waterbody nearby, are a sandy, well-drained soil type, and have a vigorous forage crop growing.

  3. Determine agronomic rate - This lets you know if and how much manure is necessary to apply to a field. Even if you are applying due to poor storage management, you need to do an agronomic rate assessment to understand how much nutrient you are applying and what effect that will have on your crop. You can then adjust later applications to account for this additional nutrient application. In the early season, this is less of a concern and can be accounted for in later applications. After August, this is a concern and can lead to leaching issues if too much nutrient is applied.

  4. Fill out the Application Risk Management worksheet for each specific field you would like to apply to. This must be conducted for the field that you apply to if the MSA is high. The ARM worksheet will identify those factors that have high risk for runoff and provide guidance on how to mitigate that risk. This worksheet must to be sent into your planner before you apply to assure that you have gone through all of the necessary steps for high risk applications. If the worksheet says the risk is high, but you still decide to apply, you may be at risk for a discharge event.

  5. Apply manure following the current Manure Application Setback Guidance - It is imperative that you follow the current manure application setback distance for all areas that have potential to discharge into a water body (i.e., swale, ditch, adjacent stream, etc.). This guidance is in place to help you prevent having a runoff/discharge event.

          Manure Setback Distances:

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
80' 80' 40' 40' 40'/10'* 10' 10' 10' 40' 80' 80' 80'

*This is a floating date and should be evaluated based on current weather and forecast information.
A big gun applicator should NEVER be closer than 40 feet at any time of the year due to drift.