In This Section

Topics

Nutrient Management Workbook

Author: OMAFRA Staff
Creation Date: 10 December 2003
Last Reviewed: 25 November 2004
1. Farmstead Information
  • Part 1
  • Part 2
    		• 2. Nutrient Management Workbook Summary
  • Metric Version
  • Imperial Version
    • 3. Guide to Completing the Workbook - Sections A to S
    1. Section A - Field Information
    2. Section B - Maximum Allowable Liquid Loading Rate
    3. Section C - Manure Information
    4. Section D - Commercial Fertilizer
    5. Section E - Previous Crop Nitrogen
    6. Section F - Previous Manure Nitrogen
    7. Section G - This Year's Manure
    8. Section H - Ontario Crop Production Requirements
    9. Section I - Agronomic Nutrient Balance
    10. Section J - Field Inputs
    1. Section K - Manure Nutrients Applied
    2. Section L - Crop Removal
    3. Section M - Crop Removal Balance
    4. Section N - Nitrogen Available for Potential Loss
    5. Section O - Nitrogen Index
    6. Section P - Phosphorous Index
    7. Section Q - Minimum Separation Distance from Surface Water
    8. Section R - Useable Acreage
    9. Section S - Maximum Rates
    4. Glossary 5. For More Information...

    Guide to Completing the Workbook – Sections A to S

    The workbook is a tool that simulates the NMAN Software.

    This workbook is organized in sections, from A to S, with each line of the Worksheet corresponding to the detailed descriptions found here help you develop the required information.

    Section Q – Minimum Separation Distance from Surface Water

    Tables 15 and 16 determine the minimum distance that manure and/or any phosphorus nutrient source must remain away from surface water.

    Slope, soil texture and application method will determine the distance that manure application must remain away from surface water. This is determined in Table 15. In addition, where the P-Index value is high (i.e. the risk of phosphorus getting to water is high) there could be an additional separation distance for any source of phosphorus. This is determined in Table 16. The mimimum separation distance from surface water becomes the greater distance (determined from Table 15 or 16).

    Use Table 1 in Section B to determine the surface water runoff potential. Use the runoff potential to determine the minimum separation distance from surface water (using Table 15).

    Table 15: Minimum Separation Distance (with established buffer zone)
    Runoff
    Potential

    Surface Applied

    Incorporated or Pretilled

    Liquid

    Solid

    Liquid

    Solid

    High

    		30.5 m

    100 ft

    		15.2 m

    50 ft

    		18.3 m

    60 ft

    		9.1 m

    30 ft

    Moderate

    		22.9 m

    75 ft

    		13 m

    40 ft

    		13.7 m

    45 ft

    		6.1 m

    20 ft

    Low

    		15.2 m

    50 ft

    		13 m

    40 ft*

    		9.1 m

    30 ft

    		4.6 m

    15 ft

    Very Low

    		13 m

    40 ft*

    		13 m

    40 ft*

    		3.0 m

    10 ft

    		3.0 m

    10 ft

    ! All farms that require a nutrient management plan (Nutrient Management Act) must have a minimum 3 m (10 ft) vegetated buffer adjacent to all surface water if nutrients are to be applied to that field.
    *Application can be made within the same distance as the incorporated values, if applied to a living crop or to greater than 30% residue cover.

    Note: Manure/Prescribed materials or commercial fertilizer application must be at least 100 m (328 ft) from any municipal well. Manure application must be at least 15 m (50 ft) from private drilled wells or 30 m (100 ft) from other private wells. Commercial fertilizer or compost must be at least 3 m (10 ft) from private wells.

    Table 16: Separation Distances and Application Rates for Various P-Index Values

    P-Index

    Separation Distance

    <3m (< 10 ft)

    3-30.5 m (10-100 ft)

    30.6-61 m (>100 – 200 ft)

    >61 m (> 200 ft)

    < 30
    stop
    No Application

    !  Only apply P205 up to crop removal (Line M)

    No additional restriction due to P-Index

    No additional restriction due to P-Index

    30 – 50
    stop
    No Application

    !  Only apply P205 up to crop removal (Line M)

    !  Only apply P205 up to crop removal (Line M)
    No additional restriction due to P-Index

    > 50

    stop
    No Application

    stop
    No
    Application

    !  Only apply P205 up to crop removal (Line M)
    !  Only apply P205 up to crop removal (Line M)

    Source: Nutrient Management Practices BMP

    Example:
    For a hydrologic soil group C soil on a 4% slope the runoff potential is "moderate" (from table 1). For surface applied liquid manure the minimum separation distance is 75 ft. However, since the phosphorus index of 23.5 was calculated and P205 is applied above crop removal (i.e. Line M > 0) the minimum distance must be increased to 100 ft. Between 75 ft and 100 ft, manure could be applied up to crop removal.

    Back to the Nutrient Management Workbook Table of Contents

    For more information:
    Toll Free: 1-866-242-4460
    E-mail: nman.omafra@ontario.ca