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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.

    Agronomic Nutrient Balance (Section D to Section I)

    Section D - Commercial Fertilizer

    Calculate the commercial fertilizer application for N, P205, and K20 from all applications during the crop year. Use one of the examples for dry or liquid fertilizer below, to help with calculations.

    Application Date

    Product

    		Incorporation Method

    Rate

    Actual (kg/ha or lb/ac)

    N

    P205

    K20

                 
                 
                 
                 

    Total

    		     

     

    Example – Dry Fertilizer
    Dry fertilizer with a blend of 8-32-16 is applied at 100 lb/ac. This fertilizer contains 8% N, 32% P205, and 16% K20.
    N        100 lb/ac x 8 % = 8 lb/ac
    P205   100 lb/ac x 32% = 32 lb/ac
    K20     100 lb/ac x 16 % = 16 lb/ac

    Example – Liquid Fertilizer
    Liquid fertilizer with a blend of 6-18-6 and a density of 12.8 lbs/gal is applied at 4 gal/ac.
    The fertilizer contains 6% N, 18% P205 and 6% K20. The application rate is 4 gal/ac x 12.8 lbs/gal = 51.2 lb/ac.
    N        51.2 lb/ac x 6 % = 3.1 lb/ac
    P205   51.2 lb/ac x 18% = 9.2 lb/ac
    K20     51.2 lb/ac x 6 % = 3.1 lb/ac

    Back to the Nutrient Management Workbook Table of Contents

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