Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 391 - DESIGN CRITERIA FOR SLUDGE APPLICATION ON LAND › Subpart E - SAMPLE COLLECTION AND ANALYSIS › Appendix B - Fertilizer Requirements for Illinois Crops

Current through Register Vol. 48, No. 28, July 12, 2024
The Agency in reviewing a permit application for a sludge
				  project will consider any recognized source of fertility recommendations for
				  Illinois crops, and soils. However, Table IV was prepared for the convenience
				  of persons planning a sludge project who do not wish to consult other
				  information sources with regard to fertilizer requirements for Illinois crops.
				  Table IV is general in nature and may not reflect an optimum recommendation for
				  all areas or soil types of this state, rather the recommendation reflects the
				  maximum rate of application consistent with current research. With respect to
				  nutrients, the available nitrogen rate will dominate as the maximum permissible
				  application rate. Note that with most sludges and crops if the available
				  nitrogen crop demand is met by applying sludge as the only fertilizer, the
				  phosphorus (P) applied with often exceed the plant requirements. Therefore, in
				  order to make the best use of sludge resources, the P rate should be followed.
				  However, it is environmentally acceptable to apply at the nitrogen rate if
				  other factors so dictate. In order to obtain more accurate recommendations for
				  fertilizer requirements, soil testing should be done.
TABLE IV
Fertilizer Requirements for Illinois
				  Crops
(pounds of nutrient)
Crop
Available N
P
P2O5
K
K20
Corn for grain
1.3 /bu.
.24/bu.
.55/bu.
0.23 /bu.
.28/bu.
Corn silage
7.5 /T
1.4 /T
3.1 /T
7.9 /T
9.4 /T
Wheat 
							 1
2.3 /bu.
0.3 /bu.
0.68 /bu.
1.7 /bu.
2.0 /bu.
Oats 
							 1
1.1 /bu.
0.17 /bu.
0.40 /bu.
1.2 /bu.
1.5 /bu.
Barley 
							 1
1.5/bu.
0.24 /bu.
0.55 /bu.
0.83 /bu.
1.0 /bu.
Rye 
							 1
2.2 /bu.
0.15 /bu.
0.69 /bu.
0.75 /bu.
1.8 /bu.
Sorghum for
grain
2.0/100 lbs.
0.33 /100 lbs.
0.75/100 lbs.
0.31 /100 lbs.
0.38 /100
Grain sorghum
for silage
7.5/T
1.4/T
3.1/T
7.9/T
9.4/T
Tall fescue 
							 3
39/T
8.1 /T
19/T
44/T
53/T
Bromegrass 
							 3
33/T
5.7 /T
13/T
42/T
51/T
Sorghum-Sudan 
							 3
40/T
6.7 /T
15/G
49/T
59/T
Orchard Grass 
							 3
50/T
7.2 /T
17/T
52/T
63/T
Timothy 
							 3
38/T
6.0 /T
14/T
52/T
63/T
Reed Canary
Grass 
							 3
55/T
5.4 /T
13/T
42/T
50/T
Alfalfa 
							 3
2
4.4 /T
10/T
50/T
60/T
Clovers 
							 3
2
6.5 /T
15/T
50/T
60/T
Soybeans
2
0.47 /bu.
1.1/bu.
2.0/bu.
2.4 /bu.
1 If straw is harvested.
2 Legumes can obtain most of their
				  nitrogen requirements from the air and are normally not fertilized with
				  nitrogen. However, if included in a crop rotation with nitrogen using crops
				  they will use the available nitrogen in the soil and not fix nitrogen from the
				  air. Therefore, it can be assumed that they will remove as much nitrogen as
				  corn for grain would remove in the same rotation.
3 Forage crops may become toxic to
				  livestock if high concentrations of molybdenum or selenium are present in the
				  sludge. Refer to Section
				  391.420(g)
				  for guidance.
If specific crop yield information is unavailable,
				  consult the Illinois Agriculture Statistics Annual Summary for the current year
				  or utilize the values shown in Appendix C. This publication is available from
				  the Illinois Cooperative Crop Reporting Service, Post Office Box 429,
				  Springfield, Illinois 62705. If a specific crop which you want to use in not
				  listed in this reference contact the University of Illinois Cooperative
				  Extension Service in your county for average yields of that
				  crop.