Guidance messages are a new category of messages that give guidance for meeting the 590 standard at the time of applications. These messages can be seen in three places within the program:
For WPDES specific guidance messages, see Additional Restriction flagging for WPDES Permitted Farms.
•Delay fall manure application until October 1 or until soil temperatures are less than 50 degrees, whichever is first.
Why SnapPlus generates this guidance message: The 590 standard limits the rate of manure N that can be applied in the fall on soils with a high leaching potential (P,W, R). With very liquid manure (<4% DM) and with higher rates, the applications also need to be delayed until soil microbial activity is lowered due to cooling temperatures.
•There is an unincorporated manure or fertilizer application on this field within the SWQMA with less than 30% residue expected at the time of application. Planting should occur just prior to, at, or promptly following the application.
-OR- (if long-term no-till)
There is an unincorporated manure or fertilizer application on this field within the SWQMA with less than 30% residue expected at the time of application. This field is in long-term no-till, the application can be made up to 7 days before planting.
Why SnapPlus generates this guidance message:
1) Install/maintain permanent vegetative buffers.
2) Maintain greater than 30% crop residue or vegetative cover on the soil surface after nutrient application
3) Incorporate nutrients within 72 hours
4) Establish a crop or cover crops prior to, at, or promptly following application
5) On long-term no-till fields with less than 30% residue, apply nutrients within seven days of planting.
If the field is in a SWQMA, there are unincorporated fall manure, fertilizer N, or P2O5 fertilizer applications, and the field does not have in-field or edge-of-field filter strips, the program checks in the RUSLE2 output to see if crop residue and/or vegetative cover are > 30% for the day before the manure application (Note: SnapPlus manure applications are sent to RUSLE2 on standard days for each season, fall is Nov. 1 or before the first fall operation in RUSLE2, spring is April 25 or before the first spring operation, and summer is July 27 in the southern 2/3 of the state). If RUSLE2 cover estimates are less than 30%, the above messages will appear. For spring and summer applications and applications on long-term no-till that do not have 30% cover expected at the time of the planned application, the program generates the above guidance messages to indicated when planting will needs to occur relative to the timing of the manure application. Fall applications on fields that do not have fall planted crops or cover crops and do not meet criteria 1, 2, or 3 are given a compliance message.
•Manure and fertilizer nutrients cannot be applied within 50 ft of any drinking water well or other conduit to groundwater in or adjacent to this field. Grazing and corn starter are allowed.
Why SnapPlus generates this guidance message: This message is whenever the Spreading Restrictions Features box has a check mark for Drinking water well or conduit to groundwater 50 ft. This message indicates that the planned applications are OK as long as the buffer area is avoided. Note that for CAFOs the Manure application restriction is 100 ft.
•Irrigation well 8 ft - No manure or fertilizer (unless through fertigation)
Why SnapPlus generates this guidance message: If the Spreading Restrictions Features box has a check box for Irrigation well within 8 ft, this message is displayed to remind applicators to avoid an 8ft area around the well when spreading manure and fertilizer.
•Public well 100 ft - No manure (except treated manure and grazing) 50 ft - no fertilizer (except corn starter).
Why SnapPlus generates this guidance message: If the Spreading Restrictions Features box has a check box for Public well 100 ft, this message is displayed to remind applicators to avoid an 100 ft area around the well when spreading any manure excepted manures that have been treated to reduce pathogens, and that within 50 ft of the well all mechanical applications need to be avoided except for starter fertilizer for corn..
•Manure applications (except treated manure and grazing) are prohibited within 1,000 ft of a Municipal well.
Why SnapPlus generates this guidance message: All mechanical manure applications are prohibited within 1000 ft of community public water supplies are prohibited unless the manure has been treated to reduce pathogens. This guidance message is generated to indicate that planned applications of manure (not Treated manure, solid or Treated manure, liquid) are being made to a field that is partially within a 1000 ft Municipal well buffer and the buffer area needs to be avoided at the time of application. If the majority of the field is inside the buffer, the software will display a Municipal well buffer compliance message rather than this guidance message.
•Winter nutrient applications are prohibited within 300 ft of conduits it groundwater. This field is within 300 ft of a: xxx (type of conduit to groundwater).
Why SnapPlus generates this guidance message: This message appears if a winter manure applications is planned on field that is within 300 ft of a direct conduit to groundwater (as shown on the Spreading Restriction Features box). This message is intended to remind the applicator to avoid the buffer area while spreading.
•This field is in an area where DNR Well Compensation Funds provided replacement water supplies for a well contaminated with livestock manure. Liquid manure and/or organic by-products are prohibited in February and March
•This field is in an area with Silurian dolomite soils. Liquid manure and/or organic by-products are prohibited in February and March
Why SnapPlus generates these guidance messages: The 590 standard prohibits surface applications of liquid manure and/or organic by-products during February and March on areas shown in SnapMaps as areas where DNR Well Compensation funds provided replacement water supplies for wells contaminated with livestock manure or Silurian dolomite soils (less than 5 ft of soil over SIlurian dolomoite bedrock).
•Reduce tillage, adjust the crop rotation, or implement other practices to control ephemeral erosion
Why SnapPlus generates this guidance message: This message appears when an ephemeral channel is noted in the Field Problems table and the field does not have any contouring, grass filter areas, or fall cover crops and the residue is not expected to be greater than 30% after planting.
•Winter nutrient applications are prohibited within the Surface Water Quality Management Area (SWQMA) on this field. Avoid the SWQMA in the winter and plan applications for this part of the field for other times of the year.
Why SnapPlus generates this guidance message: When a winter application is made in the a field with a SWQMA, the "Spreadable" Area SnapPlus uses includes only non-SWQMA areas because the 590 standard prohibits winter applications in the SWQMA. This guidance message is intended to remind applicators to avoid the SWQMA for applications when the soil is frozen or snow-covered.
The compass button, seen outlined in red in the below screenshot, will turn yellow if you have guidance. Clicking on it will allow you to see your guidance messages for that field and crop year.
When there are no guidance messages for a particular field and year, the compass button will look like this:
A compass button will appear to the right of the Season Notes section of the year, as seen outlined in red in the screenshot below. Clicking on it will allow you to see your guidance messages for that field and crop year.
Running the Implementation Guidance Report (NM7) will allow you to see all Guidance messages for all fields and years for which the report is run. It is recommended that farmers keep a copy of this report handy for help with management decisions at the time of application.