Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 560 - DESIGN CRITERIA FOR FIELD APPLICATION OF LIVESTOCK WASTE
Subpart B - DESIGN CRITERIA
Appendix A - Agronomic Fertilization Rates for Various Illinois Crops

Universal Citation: 35 IL Admin Code ยง A
Current through Register Vol. 48, No. 38, September 20, 2024

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.

Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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