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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. Glossary5. 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 H - Ontario Crop Production Requirements

    Using soil test results, obtain production requirements from OMAF Publication 811, 360 or 363. Recommendations for some common field crops are displayed in the tables below. If a soil test is unavailable, assume that the P test is 101 mg/l, and the K test is 251 mg/l. These values will give a zero recommendation for phosphorus and/or potash. O. Reg 267/03 requires soil samples for all but initial required regulated NMP.

    Table 8: P2O5 and K2O Recommendations - Metric

    Soil Test

    P2O5 Recommendations (kg/ha)

    (mg/L)

    Corn

    Beans

    Wheat

    Canola

    Alfalfa

    0 - 3

    110
    81
    71
    71
    180

    4 - 5

    100
    61
    61
    61
    120

    6 - 7

    90
    50
    50
    50
    90

    8 - 9

    69
    40
    30
    30
    61

    10 - 12

    50
    30
    20
    20
    30

    13 - 15

    20
    20
    20
    20
    20

    16 - 20

    20
    0
    20
    0
    0

    21 - 25

    20
    0
    0
    0
    0

    26 - 30

    20
    0
    0
    0
    0

    > 31

    0
    0
    0
    0
    0

    Soil Test

    K2O Recommendations(kg/ha)

    (mg/L)

    Corn

    Beans

    Wheat

    Canola

    Alfalfa

    0 - 15

    170
    121
    50
    71
    480

    16 - 30

    160
    111
    40
    50
    400

    31 - 45

    140
    91
    30
    40
    319

    46 - 60

    110
    81
    20
    30
    270

    61 - 80

    80
    61
    20
    20
    200

    81 - 100

    50
    40
    20
    20
    130

    101 - 120

    30
    30
    20
    0
    69

    121 - 150

    0
    0
    0
    0
    20

    > 151

    0
    0
    0
    0
    0

    Source: OMAF Publication 811 Agronomic Guide for Field Crops

    Table 8: P2O5 and K2O Recommendations - Imperial

    Soil Test

    P2O5 Recommendations (lb/ac)

    (ppm)

    Corn

    Beans

    Wheat

    Canola

    Alfalfa

    0 - 3

    98

    72

    63

    63

    161

    4 - 5

    89

    54

    54

    54

    107

    6 - 7

    80

    45

    45

    45

    80

    8 - 9

    62

    36

    27

    27

    54

    10 - 12

    45

    27

    18

    18

    27

    13 - 15

    18

    18

    18

    18

    18

    16 - 20

    18

    0

    18

    0

    0

    21 - 25

    18

    0

    0

    0

    0

    26 - 30

    18

    0

    0

    0

    0

    > 31

    0

    0

    0

    0

    0


    Soil Test

    K2O Recommendations (lb/ac)

    (ppm)

    Corn

    Beans

    Wheat

    Canola

    Alfalfa

    0 - 15

    152
    108
    45
    63
    428

    16 - 30

    143
    99
    36
    45
    357

    31 - 45

    125
    81
    27
    36
    285

    46 - 60

    98
    72
    18
    27
    241

    61 - 80

    71
    54
    18
    18
    178

    81 - 100

    45
    36
    18
    18
    116

    101 - 120

    27
    27
    18
    0
    62

    121 - 150

    0
    0
    0
    0
    18

    > 151

    0
    0
    0
    0
    0

     

    Table 9. Nitrogen Recommendations for Common Field Crops
    Nitrogen Recommendations - Corn
    Location
    		Expected Yield
    6
    tonne/
    ha     		100
    bu/ac    		8
    tonne/
    ha    		130
    bu/ac    		9
    tonne/
    ha    		150
    bu/ac    		10
    tonne/
    ha    		160
    bu/ac    		11
    tonne/
    ha    		175
    bu/ac
    Eastern Ontario
    		95 kg/ha82 lb/ac135 kg/ha120 lb/ac168 kg/ha150 lb/ac179 kg/ha160 lb/ac202 kg/ha180 lb/ac
    Western/Central (<2700 chu)
    		106 kg/ha95 lb/ac123 kg/ha110 lb/ac135 kg/ha120 lb/ac135 kg/ha120 lb/ac140 kg/ha125 lb/ac
    Midwestern Ontario
    (2700-2900 chu)
    		140 kg/ha125 lb/ac157 kg/ha140 lb/ac168 kg/ha150 lb/ac168 kg/ha150 lb/ac179 kg/ha160 lb/ac
    Southwestern Ontario
    (>2900 chu)
    		168 kg/ha150 lb/ac185 kg/ha165 lb/ac196 kg/ha175 lb/ac202 kg/ha180 lb/ac213 kg/ha190 lb/ac
    For sidedress applications in SW Ontario reduce N recommendations by 15%

    Nitrogen Recommendations - Cereals and Canola
    CropExpected Yield
    2.4
    tonne/ha    		35
    bu/ac    		4.0
    tonne/ha    		60
    bu/ac    		4.7
    tonne/ha
    70
    bu/ac
    		5.4
    tonne/ha    		80
    bu/ac
    Winter Wheat (soft white/red)
    ---
    ---
    84 kg/ha
    75 lb/ac
    95 kg/ha
    85 lb/ac
    112 kg/ha
    100 lb/ac
    Winter Wheat (hard red)
    ---
    ---
    123 kg/ha
    110 lb/ac
    135 kg/ha
    120 lb/ac
    151 kg/ha
    135 lb/ac
    Spring Wheat, Barley (<2600 chu)
    71 kg/ha
    63 lb/ac
    71 kg/ha
    63 lb/ac
    71 kg/ha
    63 lb/ac
    71 kg/ha
    63 lb/ac
    Barley, Mixed Grain (>2600 chu)
    45 kg/ha
    40 lb/ac
    45 kg/ha
    40 lb/ac
    45 kg/ha
    40 lb/ac
    45 kg/ha
    40 lb/ac
    Winter Barley, Winter Rye*
    91 kg/ha
    81 lb/ac
    91 kg/ha
    81 lb/ac
    91 kg/ha
    81 lb/ac
    91 kg/ha
    81 lb/ac
    Oats, Spring Rye
    (<2600 chu)
    56 kg/ha
    50 lb/ac
    56 kg/ha
    50 lb/ac
    56 kg/ha
    50 lb/ac
    56 kg/ha
    50 lb/ac
    Oats, Spring Rye
    (>2600 chu)
    36 kg/ha
    32 lb/ac
    36 kg/ha
    32 lb/ac
    36 kg/ha
    32 lb/ac
    36 kg/ha
    32 lb/ac
    Spring Canola
    (<2300 chu)
    135 kg/ha
    120 lb/ac
    135 kg/ha
    120 lb/ac
    135 kg/ha
    120 lb/ac
    ---
    ---
    Spring Canola
    (>2300 chu)
    101 kg/ha
    90 lb/ac
    101 kg/ha
    90 lb/ac
    101 kg/ha
    90 lb/ac
    ---
    ---
    Winter Canola
    (at planting) -
    39 kg/ha
    		35 lb/ac
    39 kg/ha
    		35 lb/ac
    39 kg/ha
    35 lb/ac
    ---
    ---
    Winter Canola
    (spring) -
    163 kg/ha
    		145 lb/ac
    202 kg/ha
    		180 lb/ac
    213 kg/ha
    190 lb/ac
    ---
    ---
    * N rec for Winter Rye not in rotation with Tobacco
    Nitrogen Recommendations - Forages
    CropForage Value $/tonne ($/ton)
    $33/
    tonne    		$30/
    ton    		$55/
    tonne    		$50/
    ton    		$77/
    tonne    		$70/
    ton
    Hay or Pasture
    (>1/2 legumes)
    0
    0
    0
    0
    0
    0
    Hay or Pasture
    (1/3 to 1/2 legume)
    67 tonne/ha
    60 bu/ac
    67 tonne/ha
    60 bu/ac
    67 tonne/ha
    60 bu/ac
    Grass Hay*
    (less than 1/3 legume)
    56 tonne/ha
    50 bu/ac
    95 tonne/ha
    85 bu/ac
    112 tonne/ha
    100 bu/ac
    New legume seeding
    (with a nurse crop)
    16 tonne/ha
    14 bu/ac
    16 tonne/ha
    14 bu/ac
    16 tonne/ha
    14 bu/ac
    New legume seeding
    (without a nurse crop)
    0
    0
    0
    0
    0
    0
    *Assumes a 2 cut system - (one cut decrease by 20%; three cuts increase by 20%)
    Nitrogen Recommendations - Beans
    CropExpected Yield
    33 tonne/ha30 bu/ac
    Soybeans
    0
    0
    Dry Edible Beans
    45 to 67 kg/ha
    40 to 60 lb/ac
    Source: Agronomy Guide for Field Crops OMAF Publication 811

    Example:

    A field located in Eastern Ontario has a P soil test of 35 mg/L (or ppm) and K soil test of 79 mg/L (or ppm). The field is to be planted to corn and it's expected to yield 135 bu/ac. The N requirement is obtained from the top chart by estimating the yield between 130 bu/ac and 150 bu/ac. The N recommendation is approximately 128 lb/ac. The phosphorus recommendation will be zero, and the potash recommendation will be 71 pounds of K20 per acre.

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