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 Illinois Administrative Code (Last Updated: March 27, 2024)
 TITLE35. ENVIRONMENTAL PROTECTION
 PART560. DESIGN CRITERIA FOR FIELD APPLICATION OF LIVESTOCK WASTE
 SUBPARTB. DESIGN CRITERIA

  §560.APPENDIX A. Agronomic Fertilization Rates for Various Illinois Crops  

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    POUNDS OF NUTRIENT

    CROP

    AVAILABLE N

    P2O5

    K2O

    Corn for grain

    1.3/bu.

    .55/bu.

    0.28/bu.

    Corn silage

    7.5/T

    3.1/T

    9.4/T

    Wheat (1)

    2.3/bu.

    0.68/bu.

    2.0/bu.

    Oats (1)

    1.1/bu.

    0.40/bu.

    1.5/bu.

    Barley (1)

    1.5/bu.

    0.55/bu.

    1.0/bu.

    Rye (1)

    2.2/bu.

    0.69/bu.

    1.8/bu.

    Grain sorghum for grain

    2.0/100 lbs.

    0.75/100 lbs.

    0.38/100 lbs.

    Grain sorghum for silage

    7.5/T

    3.1/T

    9.4/T

    Tall fescue

    39/T

    19/T

    53/T

    Bromegrass

    33/T

    13/T

    51/T

    Sorghum-Sudan

    40/T

    15/T

    59/T

    Orchard Grass

    50/T

    17/T

    63/T

    Timothy

    38/T

    14/T

    63/T

    Reed Canary Grass

    55/T

    13/T

    50/T

    Alfalfa

    (2)

    10/T

    60/T

    Clovers

    (2)

    15/T

    60/T

    Soybeans

    (2)

    1.1/bu.

    2.4/bu.

     

    (1)        If straw is removed.

     

    (2)        Legumes can obtain most of their N from the air and are normally not fertilized with N.  However, if included in a crop rotation with nitrogen using crops, they will use the available N in the soil and not fix N from the air.  Therefore, it can be assumed that they will remove as much N as corn for grain would in the same rotation.

     

    This information is general in nature and may not reflect an accurate recommendation for all areas or soil types of the State.  Any recognized fertility recommendation for Illinois crops, climate and soils is acceptable in lieu of these general figures.  In order to obtain more accurate recommendations for phosphorus and potassium, soil testing should be done.