Throughout the CNMP procedure, it is important to keep good records. Manure application is no exception. Good record keeping is a cornerstone to producing crops with the highest yield possible, as well as utilizing manure efficiently.
You will need the following information:
Assessment of fields for risk level
Assess your fields using the following classification system:
Low: These fields have low risk for runoff or leaching of nutrients when manure is applied. Manure may be applied during the winter.
Medium: These fields have conditions that allow runoff or leaching of nutrients, but can be controlled through proper application and irrigation practices. Use caution
when applying manure during the winter to assure that manure does not runoff.
High: These fields have high risk for runoff and leaching of nutrients, especially during the winter and following irrigation. Use caution when applying manure in late fall and
early spring. Manure should be incorporated prior to irrigation on these fields to eliminate the potential for runoff.
Spreader Calibration Information
This is obtained in Step 7.1 through the Spreader Calibration Worksheet
Use this spreadsheet for your record keeping:
(*Note- Excel spreadsheets are programed to do calculations for you. On some computers you can do calculations directly on your computer. On others you must save Excel files to your computer or disk before using the spreadsheets. )
Directions for Manure Application Record Keeping:
1. Enter by risk level the field number or name, acres, and crop grown. From spreader calibration information (Step 7.1), enter the average tons in a spreader load.
2. Spread only on fields with light shaded squares. Keep track of how many loads are spread on each field with a tic mark in the appropriate shaded square. Count the total number of tic marks and enter that number in the total number of loads applied.
3. Multiply the total number of loads applied by the tons/load to get total tons applied. Divide the total tons applied by the acres to get tons applied per acre.
4. Nutrients from manure applications should be accounted for when developing fertilizer recommendations for your crops. When manure is applied based on crop phosphorus needs, additional nitrogen may need to be added. Manure applications based on crop nitrogen needs will result in excess application of phosphorus.
5. Target manure applications to fields that will benefit most from additional nutrients (Fields with annual crops and low levels of nitrogen and phosphorus).
Remember these Manure Handling Rules of Thumb:
*Use appropriate manure application setbacks next to water courses including ditches, wetlands, saturated areas, springs, wells or pond
*Manure should not be spread on steep slopes or natural draws that allow drainage to surface water or ground water recharge areas.
*Do not spread manure during snow melt, heavy rainfall or when the ground is saturated.
*Clean spreading equipment at least 100 feet away from wells and water bodies.