07/2024 cmc DNR Form 542-2021
Introduction and Instructions for the
Nutrient Management Plan Form
Who Needs to Submit a Plan?
• The owner of an open feedlot
1
operation which has an animal unit capacity of 1000 or more animal units.
• The owner of an animal feeding operation who is required to have a national pollutant discharge elimination
system (NPDES) permit.
• An animal truck wash facility
2
that exceeds an average of 2,000 gallons per day as calculated on a monthly basis.
NOTE: A comprehensive nutrient management plan or CNMP can be substituted for the NMP if the producer is applying for
federal cost-share under the Environmental Quality Incentives Program (EQIP). An existing manure management plan
(MMP) may be used for the confinement
3
operation portion of a combined
4
operation.
Instructions for Use of These Forms
• Make additional copies of pages 2 and 3 as needed.
o Submit one copy of the plan and all the attachments to your local DNR field office (listed below) when
submitting updates to existing NMPs.
• In addition to the required forms, the information indicated below must be maintained as part of the nutrient
management plan.
Supporting Information to be maintained and submitted with the current NMP (in addition to required forms):
• A plat map which shows the location of the animal feeding operation and of all fields being used for manure
application;
• Aerial photos of all fields being used for manure application. For each field, mark the field boundaries, areas not
available or unsuitable for manure application, and areas where specific restrictions on manure application
apply. For an animal feeding operation that is required to have an NPDES permit, these restrictions include
setback requirements for land application of manure, litter and process wastewater as set forth in endnote “cc”
on page 9 of this form.
• Information documenting the optimum yields calculated for the manure application fields (if required – see
endnote “f”);
• Manure and effluent sampling results, if sample results were used to determine the manure and effluent’s
nutrient content for this plan;
• Operations using irrigation to apply manure must provide information indicating how they will comply with
applicable restrictions and requirements, and any additional methods or practices that will be used to reduce
potential odors;
• Written manure application agreements for all fields identified in the plan that are not owned or rented for crop
production purposes by the owner of the animal feeding operation;
• Natural Resources Conservation Service (NRCS) P index “detailed report” from the Iowa P index calculator
(available at http://www.ia.nrcs.usda.gov/) and a document (e.g., RUSLE2 profile erosion calculation record)
indicating the inputs and results of RUSLE2 for each field in the plan.
Plan Updates & Recordkeeping
• Prior to making changes in an operation’s nutrient management practices, the operation must update the plan
to show the proposed changes. Updates should be maintained on site.
• Records of manure and effluent application must be maintained and be available for the DNR to inspect. For a
list of record keeping requirements, see 65.209(10)“b”. Records must be maintained for five years after the year
of manure application or for the length of the crop rotation, whichever is greater.
1
Open Feedlot: Unroofed or partially roofed area where livestock or poultry are confined for more that 45 days out of any 12-month period.
2
Animal truck wash facility: An operation engaged in washing single-unit definitions in items 1&2 above.
3
Confinement: Totally roofed area where livestock or poultry are confined for more than 45 days out of any 12-month period.
4
Combined: combined operation includes both of the other two definitions in items 1 & 2, above.
07/2024 cmc DNR Form 542-2021
Assistance
Assistance in developing a nutrient management plan may be available from a number of sources, including private
consultants, Iowa State University Extension, and USDA’s Natural Resources Conservation Service. Some of these
sources will prepare a complete plan for an operation, while others will only provide general assistance. Contact your
county Extension or NRCS office to determine the assistance they will provide, as well as to obtain a list of consultants
who will prepare plans. If you have specific questions about the Nutrient Management Plan forms, contact your regional
DNR Field Office. See attached map for contact information and to determine the appropriate office.
Environmental Services Division Field Office Locations
Iowa DNR Environmental Field Office locations can be found at www.IowaDNR.gov/FieldOffice
Example of Legal Description for Facility
Please refer to the example below when describing the location of your operation on Page 1. This property is located in
Washington Township, Polk County.
Remember: Report all manure releases to the DNR’s 24-hr. Spill Line at
(515) 725-8694 within 6 hours of the onset or discovery of the spill.
07/2024 cmc 1 DNR Form 542-2021
Nutrient Management Plan Form
Operation Information
Instructions: Complete this form for your animal feeding operation. Endnotes are provided on pages 11-14. The information
within this form, and the attachments, describes my animal feeding operation, my manure storage and handling system, and my
planned manure management system. I (we) will manage the manure, and the nutrients it contains, as described within this
nutrient management plan and any revisions of the plan, individual field information, and field summary sheet, and in accordance
with current rules and regulations. Deviations permitted by Iowa law will be documented and maintained in my records.
Date:
(Signature)
(Print Name)
Name of operation:
Facility ID No.:
(911 Address)
(City)
(State)
(Zip Code)
¼ of the
¼ of Sec
T
R
(1/4 1/4)
(1/4)
(Section)
(Tier)
(Range)
(Township Name)
(County)
Owner and Contacts of the animal feeding operation:
Owner:
Phone:
Address:
Email (optional):
Cell phone (optional):
Contact person (if different than owner):
Phone:
Address:
Email (optional):
Cell phone (optional):
This nutrient management plan is for: (check one)
existing operation, not expanding
existing operation, expanding
existing operation, new owner
new operation
Construction and Expansion Dates:
date of initial construction
and date(s) of all expansion(s)
Table 1. Information about livestock production and nutrient management system
1
Animal
Type
a
2
Description of Manure Storage/
Manure Type
b
(e.g. scraped solids from open lot , effluent from
runoff basin, bedded barn manure , liquid
manure from below building pit)
3
Max.
Number of
Animals
Housed
(head)
4
N
c
5
P
2
O
5
c
6
gal/space/day
or
ton/space/yr
d
7
Annual Manure
Production
e
(gallons or tons)
lb/1000 gal /
lb/ton
Total Tons
Total Gallons
Confinement Animals Covered by MMP?
Yes
No (if yes, application rate calculations are not required in this plan)
Source of Nutrient Content Data (columns 4, 5): standard tables, analysis of manure samples, other:
07/2024 cmc 2 DNR Form 542-2021
Determining Maximum Allowable Manure Application Rates
Instructions: Complete a worksheet for each unique combination of the following factors (crop rotation, optimum crop yield,
manure nutrient concentration, remaining crop N need, and method of application) that occurs at this operation. Endnotes are given
on pages 11-14.
Management Identification (Mgt ID
f
):
(Identify this application scenario by letter, refer to endnote e)
Method used to determine optimum yield
g
:
Timing of Application:
Method of Application
h
:
Application Loss Factor
h
:
If spray irrigation is used, identify method
i
:
Table 2. Manure Nutrient Concentration
Table 3. Crop Usage Rateso
Manure Nutrient Content (lbs/1000gal or lbs/ton)
j
(lbs/bu or lbs/ton)
N
P
2
O
5
Corn
0.32
Total N
P
2
O
5
Soybean
3.8
0.72
% TN available 1
st
year
k
% 2
nd
year
% 3
rd
year
Alfalfa
50
13
Available N 1
st
year
l
2
nd
year
m
3
rd
year
n
* Use blank space above to add crop not listed.
Table 4. Calculations for rate based on nitrogen (always required)
1
Applying Manure For
p
(crop to be grown)
2
Optimum Crop Yield
g
bu or ton/acre
3
P
2
O
5
removed with crop by harvest
q
lb/acre
4
Crop N utilization
r
lb/acre
5a
Legume N credit
s
lb/acre
5b
Commercial N planned
t
lb/acre
5c
Manure N carryover credit
u
lb/acre
6
Remaining crop N need
v
lb/acre
7
Manure rate to supply remaining N
w
gal/acre or
ton/acre
8
P
2
O
5
applied with N-based rate
x
lb/acre
Table 5. Calculations for rate based on phosphorus (required if P-based rates are planned)
9
Commercial P
2
O
5
planned
y
lb/acre
10
Manure rate to supply P removal
z
gal/acre or
ton/acre
11
Manure rate for P based plan
aa
gal/acre or
ton/acre
12
Manure N applied with P-based plan
bb
lb/acre
Table 6. Application rates that will be carried over to page 3.
13
Planned Manure Application Rate
cc
gal/acre or
ton/acre
When applicable, manure application rates must be based on the P index value as follows:
(0-2) N-based manure management.
(>2-5) N-based manure management but P application rate cannot exceed two times the P removal rate of the crop schedule.
(>5-15) No manure application until practices are adopted to reduce P index to 5 or below.
(>15) No manure application.
07/2024 cmc 3 DNR Form 542-2021
Year by Year Nutrient Management Plan Summary
Instructions: Complete this form for each of the next five growing seasons, to demonstrate sufficient land base to apply manure over multiple crop years. If this page is identical
for multiple years (e.g. every other year), submit only once for the identical years, and indicate which years the form represents. Endnotes are given on pages 11-14.
Crop Year(s):
1
Field
Designation
dd
2
Field Location
___ ¼ of the ___1/4 Sec ___ T____ R____
Township Name _____________
County Name ____________
3
Mgt
ID
ee
4
Planned
Crop
5
Acres
receiving
manure
ff
6
Own, rent, or
agreement (include
length of
agreement)
gg
7
P Index
Value
hh
Planned Application
ii
10
Correct
Soil Test
for P
jj
8
Gal or
ton/acre
9
Gal or
ton/field
Total acres available for manure application
Total Gallons that could be applied
Total Tons that could be applied
07/2024 cmc 8 DNR Form 542-2021
Animal Mortalities
NPDES requirement:
• Ensure proper management of mortalities (i.e., dead animals) to ensure that they are not disposed of in a liquid
manure, storm water, or process wastewater storage or treatment system not specifically designed to treat
animal mortalities. [40 CFR 122.42(e)(1)(II)]
ELG Requirement:
• Mortalities must not be disposed of in any liquid manure or process wastewater system, and must be handled in
such a way as to prevent the discharge of pollutants to surface water, unless alternative technologies pursuant
to § 412.31(a)(2) and approved by the Director are designed to handle mortalities. [40 CFR 412.37(a)(4)]
A. Method of Animal Mortality Handling
Composting
Rendering
Burial
Other:
B. Method of Mortality Storage Prior to Final Disposal
C. Recordkeeping – Animal Mortalities
The following records must be maintained on site at the permitted facility for at least five years from the date they are
created. It is recommended that these records be kept with the NMP.
• Documentation of mortality handling practices.
Clean Water Diversion
NPDES Requirements:
• Ensure that clean water is diverted, as appropriate, from the production area. [40 CFR 122.42)e)(1)(iii)]
• There must be routine visual inspections of the CAFO production area. At a minimum, the following must be
visually inspected:
o Weekly inspections of all storm water diversion devices, runoff diversion structures, and devices channeling
contaminated storm water to the wastewater and manure storage structure; [40 CFR 412.37(a)(1)(i)]
A. Diversion of Clean Water From the Production Area
Is clean water diverted from the production area?
Yes
No
a. If Yes, describe the clean water diversion system:
b. If No, please ensure that the attached calculations for determining total storage capacity (question II.B.3)
account for all runoff, including clean water that has not been diverted from the production area.
B. Recordkeeping – Diversion of Clean Water
The following records must be maintained on site at the permitted facility for at least five years from the date they are
created. It is recommended that these records be kept with the NMP.
• Records of weekly visual inspections of all storm water diversion devices, runoff diversion structures, and
devices channeling contaminated storm water to the wastewater and manure storage structure.
07/2024 cmc 9 DNR Form 542-2021
Prevention of Direct Contact with Waters of the United States
NPDES Requirement:
• Prevent direct contact of confined animals with waters of the United States. [40 CFR 122.42(e)(1)(iv)]
A. Prevention of Direct Contact
Do the animals have access to waters of the United States within the production area?
Yes
No
B. Measures to Prevent Direct Contact
List the measures used to prevent direct contact (e.g. fencing) of animals with waters of the United States within the
production area:
Chemical Handling
NPDES requirement:
• Ensure that chemicals and other contaminants handled on-site are not disposed of in any manure, litter, process
wastewater, or storm water storage or treatment system unless specifically designed to treat such chemicals
and other contaminants. [40 CFR 122.42(e)(1)(v)]
A. Measures for Chemical Handling
Check the appropriate boxes below to indicate the measures taken to prevent pesticides, commercial fertilizers,
hazardous and toxic chemicals, and petroleum by-products from contaminating process wastewater or storm water
storage and treatment systems:
1. Chemicals are stored in proper containers. Please describe:
2. Chemicals are properly disposed of that have expired or will not be used. Please describe:
3. Chemical containers are properly disposed. Please describe:
4. Chemical storage areas are self-contained (no drains or other pathways for spilled chemicals to exit the storage area).
Please describe:
5. Chemical storage areas are covered to prevent contact with rain and snow. Please describe:
6. Emergency procedures and equipment are in place to contain and clean up chemical spills. Please describe:
07/2024 cmc 10 DNR Form 542-2021
7. Chemical handling and equipment wash areas are designed and constructed to prevent contamination of surface
waters and wastewater and storm water storage and treatment systems. Please describe:
8. Chemicals are handled according to the label. Please describe:
B. Recordkeeping – Chemical Handling
The following records must be maintained on site at the permitted facility for at least five years from the date they are
created. It is recommended that these records be kept with the NMP.
• Records of inspections and maintenance activities conducted to ensure that chemical and other contaminants
do not enter any manure, litter, process wastewater, or storm water storage or treatment system not
specifically designed to treat such chemicals and other contaminants.
Manure and Effluent Storage
NPDES requirement:
• Ensure adequate storage of manure, litter, and process wastewater, including procedures to ensure proper
operation and maintenance of the facilities. [40 CFR 122.42(e)(1)(i)]
ELG requirements:
• The production area [must be] designed, constructed, operated and maintained to contain all manure, litter, and
process wastewater including the runoff and the direct precipitation from a 25-year, 24-hour rainfall event. [40
CFR 412.31(a)(1)(i)] OR the facility has requested and the DNR Director has approved Voluntary Alternative
Performance Standards in accordance with 40 CFR 412.31(a)(2).
• There must be routine visual inspections of the CAFO production area. At a minimum, the following must be
visually inspected:
o Weekly inspections of all storm water diversion devices, runoff diversion structures, and devices channeling
contaminated storm water to the wastewater and manure storage structure;
o Daily inspection of water lines, including drinking water or cooling water lines;
o Weekly inspections of the manure, litter, and process wastewater impoundments; the inspection will note
the level in liquid impoundments as indicated by the depth marker in paragraph (a)(2) of this section. [40
CFR 412.37(a)(1)]
• All open surface liquid impoundments must have a depth marker which clearly indicates the minimum capacity
necessary to contain the runoff and direct precipitation of the 25-year, 24-hour rainfall event. [40 CFR
412.37(a)(2)]
A. Storage Structure Operation and Maintenance
Describe procedures to operate and maintain storage structures to hold all wastes accumulated during the storage
period, the direct precipitation and runoff from a 25-year, 24-hour storm, including visual inspections, as appropriate.
Attach additional sheets if needed.
07/2024 cmc 11 DNR Form 542-2021
B. Recordkeeping- Storage
The following records must be maintained on site at the permitted facility for at least five years from the date they are
created. It is recommended that these records be kept with the NMP.
1. Records of weekly visual inspections of all storm water diversion devices, runoff diversion structures, and
devices channeling contaminated storm water to the wastewater and manure storage structure.
2. Records of daily inspection s of water lines, including drinking water or cooling water lines;
3. Records of weekly inspections of the manure, litter, and process wastewater impoundments
4. Weekly records of depth of manure and wastewater in all liquid impoundments as indicated by the depth
marker.
5. Design documentation for all manure, litter, and wastewater storage structures.
6. Documentation of all overflows from manure
Inspection of Land Application Equipment
ELG Requirement:
• Inspect land application equipment for leaks. The operator must periodically inspect equipment used for land
application of manure, litter, and other process wastewater. [40 CFR 412.4(c)(4)]
A. Equipment Inspection Procedures.
Describe procedures to periodically inspect land application equipment for leaks, including the frequency and timing of
inspections:
B. Recordkeeping- Equipment Inspection.
The following records must be maintained on site at the permitted facility for at least five years from the date they are
created. It is recommended that these records be kept with the NMP.
• Records of periodic land application equipment inspections, including date and description of each inspection.
Nutrient Management Plan Endnotes
a
For example: Mature dairy cattle, whether milked or dry are one type. Veal calves are another type. All other cattle, including
finisher beef cattle, dairy heifers, feeder calves, etc… are a third type of cattle and should be added together.
b
Settled solids, scraped solids, feedlot effluent, animal truck wash water, etc.…
c
From Iowa State University Extension Publication Pm 1003 Using Manure Nutrients for Crop Production, or other sources- identify
source in space provided below Table 1 on page 1. If no lab analysis is available for animal truck wash facility, assume 2 lbs.
N/1000 gallon and 1lb. P
2
O
5
/1000 gallon.
d
If actual volumes or weights are used, DNR may require submittal of supporting data. If actual manure N and P
2
O
5
concentrations
are used in the plan, measured volume or weight must also be used. If no water usage records are available for animal truck
wash facility, assume 600 gallons/truck.
e
Column 7 = Column 3 * Column 6. If using gal/space/day in Column 6, you must convert units to gal/space/year by multiplying by
365.
f
Use the management ID to identify each unique combination of the following factors (crop rotation, optimum crop yields, manure
nutrient concentration, remaining crop N need, method of application) that occur. The idea behind the management ID is to
07/2024 cmc 12 DNR Form 542-2021
group fields with identical management on the same page 2, to avoid the redundancy of doing the exact same calculations for
multiple fields.
For example, if 8 fields in the plan are in a corn/bean rotation with yields of 160 and 50 bu/acre and all will receive injected manure
with the same nutrient concentration and availability, then page two would only need to be filled out once for the 8 fields and
the management ID (e.g. “A”) would represent all 8 fields. The same management ID could be used to describe these fields even
if they were in different phases of the crop rotation (i.e. some are in corn and some in beans each year).
g
Yields can be used from any of the following:
• USDA Iowa Ag statistics county yield averages
• Multi-peril insurance proven yields
• USDA Farm Service Agency proven yields
• Individual farm proven yields
• Soil survey interpretation records
Documentation of the information used to determine optimum yields must kept with the plan (DNR may require submittal of
yield documentation). Documentation may include copies of historical farm yield records, soil survey maps and average yields
for the soils found, FSA yield data, etc... If Iowa Ag Statistics county average yields, Appendix A8, are used, documentation is not
required to determine optimum yields for corn and soybean crops. The optimum yield for each crop may be set equal to either
the average of the last 5-year county yields plus 10 percent or the average of the highest 4 out of the last 5-year county average.
If crops other than corn or soybeans are grown, Iowa Ag Statistics yield data for those crops will need to be obtained and
optimum yield levels calculated (both the yield data and the calculations should be kept with the plan). If proven yield methods
are used to determine optimum yields, the Appendix B2 Worksheet should be used to calculate the optimum yields.
h
Use list of application methods and application loss factors provided in Appendix A7. If methods other than those listed in
Appendix A7 are used, identify the methods and the nitrogen loss factors for those methods.
i
Center pivot irrigation, traveling guns, low-pressure drop nozzle systems, etc…
j
From standard tables (Appendix A1), your own samples, or other sources.
k
A nutrient management plan may be developed based on the assumption that less than 100 percent of the nitrogen remaining in
the manure after deducting application losses will be available for plant use in the first crop year after manure application. See
Iowa State University Extension Publication PMR 1003 Using Manure Nutrients for Crop Production for suggested availability
values.
l
1
st
year available N = Total N x Application loss factor x Percentage of TN available in the first year (e.g. for 95% N available in first
year multiply by 0.95).
m
2
nd
year available N = Total N x Application loss factor x Percentage of TN available in the second year.
n
3
rd
year available N = Total N x Application loss factor x Percentage of TN available in the third year.
o
Appendices A5 and A6 list crop nitrogen and phosphorus requirements for various crops. These values, or crop use requirements
from other credible sources, may be used to determine the crop nitrogen needs and phosphorus removal rates for the crops
included in the crop schedule for the fields. For non-legume crops such as corn or grasses, the crop N need value represents the
amount of nitrogen required to produce the optimum yield for that crop, and is determined by multiplying the crop nitrogen
requirement (in lb/bu or lb/ton of yield) times the optimum crop yield. For legume crops such as soybeans or alfalfa, the crop
utilization value represents the amount of nitrogen these legumes will utilize from the soil in producing the optimum crop yield,
provided nitrogen is available at these levels in the soil. Again, this amount is determined by multiplying the crop utilization rate
(in lb/bu or lb/ton of yield) times the optimum crop yield.
p
As a minimum, Table 4 should indicate the full crop rotation for the management ID (i.e., for a corn, corn, soybean rotation, Table 4
should cover a minimum of three crop years).
q
P
2
O
5
removed with crop by harvest = P
2
O
5
crop usage rate (Table 3) x Optimum crop yield (row 2)
r
Crop N utilization = N crop usage rate (Table 3) x Optimum crop yield (row 2)
s
Credit for nitrogen carryover from prior year legume crops should be determined as follows:
• last year’s soybean crop: 1 lb nitrogen per bushel of yield, maximum of 50 lb nitrogen per acre credit
• legume forage crop:
o last year’s crop with 50 to 100% alfalfa or other legume in stand: 100 to 140 lb nitrogen per acre
o last year’s crop with 20 to 50% alfalfa or other legume in legume/grass mixture: 50 to 80 lb nitrogen per acre
o two years ago crop with 50 to 100% alfalfa or other legume in stand: 30 lb nitrogen per acre
• last year’s legume green manure crop: 100 lb nitrogen per acre
t
Amount of N applied with commercial fertilizer (e.g. starter, with herbicide carrier, etc...).
u
Manure N carryover credit represents the amount of nitrogen available for crop use due to manure applications made in prior crop
years. The carryover N credit is determined by:
1. multiplying the amount of manure (in 1000 gal/acre or ton/acre) applied to the field in the previous crop by the 2
nd
Year
Available N concentration for the applicable manure storage source and method of application;
07/2024 cmc 13 DNR Form 542-2021
2. multiplying the amount of manure (in 1000 gal/acre or ton/acre) applied to the field two crop years ago by the 3
nd
Year
Available N concentration for the applicable manure storage source and method of application; adding the resulting N
carryover credit values together.
v
Remaining crop N need = Crop N utilization (row 4) minus (–) Legume N credit (row 5a) – Commercial N planned (row 5b) – Manure
N carryover credit (row 5c)
w
Manure rate to supply remaining N = Remaining crop N need (row 6) divided by (/) 1
st
year available N (Table 2) (x 1000 for liquid
manure)
x
P
2
O
5
applied with N-based rate = Manure rate to supply remaining N need (row 7) x P
2
O
5
concentration (Table 2) (Divide by 1000
for liquid manure)
y
Amount of P
2
O
5
applied with commercial fertilizers.
z
Manure rate to supply P removal = (P
2
O
5
removed with crop by harvest (row 3) – Commercial P
2
O
5
planned (row 9))/ Manure P
2
O
5
content (Table 2) (x 1000 for liquid manure).
aa
Manure rates for a P based plan can apply up to the amount of P
2
O
5
removed with harvest by the next 4 anticipated crops in a
single application if the application rate doesn’t exceed the N-based rate (row 7) and no additional P is applied for the period
covered by the application. For example, in a corn/soybean rotation if the “manure rate to supply P removal” (row 10) was 4
ton/acre for the corn crop and 3 ton/acre for the bean crop, then 7 ton/acre could be applied in a single application if the
nitrogen rate was not exceeded. Phosphorus in addition to crop removal may be applied if soil tests are very low or low in
phosphorus and additional phosphorus is recommended by Pm-1688 “General Guide to Crop Nutrient and Limestone
Recommendations in Iowa.”
bb
Manure N applied with P-based plan = Manure rate for P based plan (row 11) x 1
st
year available N (Table 2) (divided by 1000 for
liquid manure)
cc
Manure application rate that is planned. Use these values for page 3 of the form.
dd
Field designation may be by Farm Services Agency (FSA) field number, landowner’s name, or other suitable designation. A plat
map showing the animal feeding operation and all application fields should be kept in the plan. In addition, aerial photos (e.g.
FSA section photos) of the fields receiving manure should be in the plan with the boundaries of the individual application fields
marked. Also marked on aerial photos should be areas of the fields that are unavailable or unsuitable for manure application,
and areas where specific restrictions on manure application apply. DNR may require submittal of plat maps and aerial photos.
Areas with specific restrictions on manure application include:
• within 200 feet of a designated area: A designated area means a known sinkhole, or a cistern, abandoned well, unplugged
agricultural drainage well, agricultural drainage well surface tile inlet, drinking water well, lake, or a farm pond or a privately
owned lake as defined in Iowa Code Section 462A.2. A designated area does not include a terrace tile inlet or surface tile
inlet other than an agricultural drainage well surface tile inlet. Iowa law requires manure from an animal feeding operation
be injected or incorporated within the same day of application if applied within 200 feet of a designated area. However, this
restriction does not apply if a 50-foot buffer of permanent vegetation surrounds the designated area and no manure is
applied within the 50-foot buffer.
• Setback requirements for an animal feeding operation that is required to have an NPDES permit. As provided in 40 CFR
412.4(c)(5), “Unless the CAFO exercises one of the compliance alternatives provided for in paragraph (c)(5)(i) or (c)(5)(ii) of
this section, manure, litter, and process wastewater may not be applied closer than 100 feet to any down-gradient surface
waters, open tile line intake structures, sinkholes, agricultural well heads, or other conduits to surface waters.
i. Vegetated buffer compliance alternative. As a compliance alternative, the CAFO may substitute the 100-foot setback
with a 35-foot wide vegetated buffer where applications of manure, litter, or process wastewater are prohibited.
ii. Alternative practices compliance alternative. As a compliance alternative, the CAFO may demonstrate that a setback or
buffer is not necessary because implementation of alternative conservation practices or field-specific conditions will
provide pollutant reductions equivalent or better than the reductions that would be achieved by the 100-foot setback.”
• areas where liquid manure is applied through spray irrigation systems: see endnote “i” for page 2.
ee
Identify how the field will be managed using management IDs from page 2.
ff
The number of acres of the field that will receive manure. Acres not available for manure application include areas where
topography, soils, or other factors make manure application impossible; areas where manure will not be applied; areas where
application is prohibited under a manure disposal agreement; and areas where Iowa law or DNR rules prohibit manure
application. It may also include areas where Iowa law or DNR rules restrict manure application to methods different than those
being used by the operation.
gg
A copy of all written manure application agreements for all fields identified in the plan that are not owned or rented for crop
production purposes by the owner of the animal feeding operation must be kept with the plan (agreements must be signed by
the landowner or renter). DNR requires submittal of manure application agreements. If manure is applied based on an
agreement, also indicate in column 6 the length of the agreement (e.g. annual, 3-yr, 10-yr).
07/2024 cmc 14 DNR Form 542-2021
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Submit an NRCS P index detailed report containing a P index for each field in the NMP. Additionally, when the P index is required,
the plan must include a document (e.g. NRCS RUSLE2 profile erosion calculation record) indicating the inputs and results of
RUSLE2 for each field in the plan (These documents must be submitted to the DNR).
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Gallons or tons per acre from Page 2. Gallons or tons per field = gallons or tons per acre (column 8) x acres receiving manure
(column 5).
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Soil sampling must meet minimum requirements. Refer to Rule 65.209 in the Iowa Administrative Code for minimum soil sampling
requirements.