NR 243.14(3)
(3) Nutrient crediting. A permittee's manure and process wastewater application rates shall take into account soil nutrient levels prior to landspreading, nutrient applications from other sources, including commercial fertilizers, biosolids, first and second year manure and legume credits, and other sources of nutrients that are expected to be applied or have already been applied to land where manure or process wastewater will be applied. Adjustments shall be made to assumed nutrient credits based on actual crop yields.
NR 243.14(4)(a)
(a) Subject to additional restrictions in subs.
(6) and
(7) for the winter season, a permittee shall choose and implement one of the following options whenever manure or process wastewater is applied on areas of fields within the SWQMA:
NR 243.14(4)(a)1.
1. Not apply manure or process wastewater within 25 feet of a navigable water, conduit to a navigable water or wetland; and inject or immediately incorporate manure and process wastewater in all other areas within the SWQMA.
NR 243.14(4)(a)2.
2. Not apply manure or process wastewater within 25 feet of a navigable water, conduit to a navigable water or wetland; and surface apply liquid manure and process wastewater in all other areas of the SWQMA provided that all of the following conditions are met:
NR 243.14(4)(a)3.
3. Establish a 35-foot wide vegetated buffer adjacent to the navigable water, conduit to a navigable water or wetland where there is no application of manure or process wastewater on the buffer; and comply with a practice in this subd.
3. a. or
b. For the purposes of this subdivision, a vegetated buffer means a narrow, permanent strip of dense perennial vegetation established parallel to the contours of and perpendicular to the dominant slope of the field for the purposes of slowing water runoff, enhancing water infiltration, and minimizing the risk of any potential nutrients or pollutants from leaving the field and reaching navigable waters.
NR 243.14(4)(a)3.a.
a. Inject or immediately incorporate manure and process wastewater in all other areas within the SWQMA, or
NR 243.14(4)(a)3.b.
b. Surface apply in all other areas of the SWQMA provided the ground has 30% residue or more at the time of application and the hydraulic application rate is limited in accordance with Table 3.
NR 243.14(4)(a)4.
4. Establish a filter strip that is a minimum of 21 feet wide adjacent to the navigable water, conduit to a navigable water or wetland; and comply with a practice in this subd.
4. a. or
b. The filter strip shall be designed in accordance with NRCS Standard 393, dated January 2001. NRCS Standard 393, dated January 2001, is incorporated by reference in s.
NR 243.07.
NR 243.14 Note
Note: Copies of NRCS Standard 393, dated January 2001 and documents referenced in this standard may be inspected at the offices of the department, DATCP, NRCS, county land conservation departments and the legislative reference bureau, Madison, Wisconsin.
NR 243.14(4)(a)4.a.
a. Inject or immediately incorporate manure and process wastewater in all other areas within the SWQMA, or
NR 243.14(4)(a)4.b.
b. Surface apply in all other areas of the SWQMA provided the ground has 30% residue or more at the time of application and the hydraulic application rate is limited in accordance with Table 3.
NR 243.14(4)(a)5.
5. Not apply manure or process wastewater within 100 feet of a navigable water or conduit to a navigable water.
NR 243.14(4)(a)6.
6. Implement other practices within the SWQMA that are approved, in writing, by the department provided that the permittee demonstrates pollutant reductions are equivalent to, or better than, reductions achieved by not applying manure or process wastewater within 100 feet of downgradient navigable waters or conduits to navigable waters.
NR 243.14 Note
Note: The Wisconsin buffer initiative may provide additional information on the proper design and use of riparian buffers to best protect water quality.
NR 243.14 Note
Note: Demonstrations of equivalent practices may consist of model outputs, calculations or other means of demonstrating equivalent pollutant reductions.
NR 243.14(4)(b)
(b) The nutrient management plan shall specify the land application practices that have been selected and will be followed on each field to meet the requirements of this subsection. Permittees implementing practices under par.
(a) 1.,
2. or
4. shall demonstrate to the department how the practices provide for pollutant reductions equivalent to, or better than, reductions achieved by not applying manure and process wastewater within 100 feet of downgradient navigable waters or conduits to navigable waters.
NR 243.14(4)(c)
(c) If the application rates in Table 3 apply pursuant to any of the requirements in par.
(a) 2. to
4., any additional applications made to meet the allowed nutrient crop budget shall be done with a minimum of 7 days between applications, provided the soils are not saturated.
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See PDF for table 
1 Fine – clay, silty clay, silty clay loam, clay loam.
Medium – sandy clay, sandy clay loam, loam, silt loam, silt.
Coarse – loamy sand, sandy loam, sand. This category includes peat and muck based on their infiltration capacity.
NR 243.14(5)(a)
(a) The permittee shall assess and minimize the potential for delivery of phosphorus to waters of the state from fields by applying its manure and process wastewater in accordance with one of the methods specified in subd.
1. or
2. The permittee shall specify the method it will apply to a field in the nutrient management plan.
NR 243.14(5)(a)1.
1. Use the soil test phosphorus method specified in NRCS Standard 590. In addition, for applications to fields directly adjacent to, or that have been determined by the department to have a high potential to deliver phosphorus to, 303 (d) listed waters impaired by nutrients or outstanding or exceptional resource waters, the permittee may not increase soil test phosphorus levels over a crop rotation unless the permittee receives department approval, and the permittee can demonstrate that deliverability of phosphorus to these waters will not increase as a result of increases in soil test phosphorus in the field. The permittee may not raise soil test phosphorus levels over a rotation above the optimum level for the highest phosphorus demanding crop in a rotation for a field with soil test phosphorus levels below optimum levels.
NR 243.14 Note
Note: Maps or written descriptions of the locations of outstanding and exceptional resource and 303 (d) listed waters can be found on the department's website at
http://dnr.wi.gov.
NR 243.14 Note
Note: In accordance with s.
NR 243.14 (1) (a) and NRCS Standard 590, a permittee shall determine optimum soil phosphorus levels for various Wisconsin crops as specified in University of Wisconsin-Extension Publication A2809, “Soil Test Recommendations for Field, Vegetable and Fruit Crops."
NR 243.14(5)(b)
(b) If a permittee applies manure or process wastewater on fields with soil test levels greater than 100 ppm, the permittee shall comply with the requirements in both subd.
1. and
2.:
NR 243.14(5)(b)1.
1. For fields with soil test phosphorus levels between 100 ppm and 200 ppm, the permittee shall calculate the planned average phosphorus index value for the crop rotation or for the next 4-year period, whichever time period is less. If the calculated average phosphorus index value is greater than 6, manure and process wastewater applications to that field are prohibited. If the calculated phosphorus index value is 6 or less, applications are allowed provided that the cumulative application of phosphorus from manure and process wastewater does not exceed 50% of the cumulative annual crop phosphorus removal over the rotation or the next 4-year period, whichever is less.
NR 243.14(5)(b)2.
2. For fields with soil test phosphorus levels of 200 ppm and greater, applications of phosphorus from manure and process wastewater are prohibited unless the permittee receives department approval. The department may only approve the application if all of the following requirements are met:
NR 243.14(5)(b)2.a.
a. The permittee can demonstrate that additional applications of manure or process wastewater will not significantly increase phosphorus delivery to surface waters or wetlands.
NR 243.14(5)(b)2.b.
b. The permittee calculates the planned average phosphorus index value for the rotation or the next 4-year period, whichever is less and the planned average phosphorus index value is 6 or less.
NR 243.14(5)(b)2.c.
c. The cumulative application of phosphorus from manure and process wastewater does not exceed 50% of the cumulative annual crop phosphorus removal over the rotation or the following 4-year period, whichever is less.
NR 243.14 Note
Note: Strategies for assessing and reducing phosphorus index (PI) values, algorithms, and software for calculating the Wisconsin PI can be found at
http://wpindex.soils.wisc.edu/.
NR 243.14 Note
Note: A permittee that complies with the requirements of this section and its WPDES permit also addresses delivery of nitrogen to waters of the state.
NR 243.14(6)
(6) Solid manure winter restrictions. The restrictions in this subsection apply to the land application of solid manure on frozen or snow covered ground.
NR 243.14(6)(a)
(a)
Frozen ground-solid manure. Unless prohibited under par.
(c), solid manure may be surface applied on frozen ground if the manure is applied in compliance with the restrictions in Table 4 or otherwise immediately incorporated.
NR 243.14(6)(b)
(b)
Snow covered ground-solid manure. Unless prohibited under par.
(c), solid manure may only be land applied to snow covered ground in accordance with the following:
NR 243.14(6)(b)1.
1. If less than one inch of snow is present on the area where manure is to be land applied, the permittee may surface apply or immediately incorporate the solid manure.
NR 243.14 Note
Note: If there is less than one inch of snow on the ground and the ground is frozen, pursuant to par. (a), Table 4 restrictions must be followed when surface applying solid manure.
NR 243.14(6)(b)2.
2. If one to 4 inches of snow is present on the area where manure is to be land applied, the permittee shall surface apply the manure in compliance with restrictions in Table 4 or otherwise immediately incorporate the solid manure.
NR 243.14(6)(b)3.
3. If more than 4 inches of snow is present on the area where manure is to be land applied, the permittee shall surface apply the solid manure in compliance with the restrictions in Table 4. Incorporation of solid manure is prohibited.
NR 243.14 Note
Note: It is assumed that proper incorporation of solid manure is not achievable if more than 4 inches of snow is present at the time of application.
NR 243.14(6)(c)1.1. Beginning January 1, 2008, solid manure may not be surface applied from February 1 through March 31 if any of the following conditions exist on the area of the field where the manure is to be applied:
NR 243.14(7)
(7) Liquid manure winter restrictions. The following additional restrictions in this subsection apply to the land application of liquid manure on frozen or snow covered ground:
NR 243.14(7)(a)
(a)
Frozen ground-liquid manure. Surface application of liquid manure on frozen ground is prohibited, except for an emergency situation under par.
(d) or if allowed under par.
(e). Injection or immediate incorporation of liquid manure is allowed on frozen ground, except if prohibited due to snow covered conditions under par.
(b).
NR 243.14(7)(b)
(b)
Snow covered ground-liquid manure. Unless prohibited under par.
(c) and subject to the frozen ground prohibition in par.
(a), liquid manure may only be land applied to snow covered ground in accordance with the following:
NR 243.14(7)(b)1.
1. If less than one inch of snow is present on the area where liquid manure is to be applied, surface application, injection or immediate incorporation of liquid manure is allowed.
NR 243.14(7)(b)2.
2. If there is one to 4 inches of snow present on the area where liquid manure is to be applied, surface application of liquid manure is prohibited, except for department approved emergencies under par.
(d) or if allowed under par.
(e). Immediate incorporation or injection is allowed on areas where there is one to 4 inches of snow.
NR 243.14(7)(b)3.
3. If there is greater than 4 inches of snow on the area where liquid manure is to be applied, surface application and incorporation of liquid manure is prohibited, except for department approved emergencies under par.
(d) or if allowed under par.
(e). Injection of liquid manure is allowed on areas where there is greater than 4 inches of snow.
NR 243.14(7)(c)
(c)
High-risk runoff period. Unless there is a department approved emergency situation under par.
(d), liquid manure may not be surface applied from February 1 through March 31.
NR 243.14(7)(d)1.
1. Except as provided in subd.
3., a permittee may surface apply liquid manure on frozen or snow covered ground on an emergency basis in accordance with the restrictions in Table 5 if all of the following conditions are met:
NR 243.14(7)(d)1.a.
a. The manure is from a storage or containment facility that is designed and maintained in accordance with ss.
NR 243.15 and
243.17 to provide 180 days of storage for the manure.
NR 243.14(7)(d)1.b.
b. The application of manure is necessitated by exceedances or expected exceedances of the margin of safety level that were unavoidable due to unusual weather conditions, equipment failure or other unforeseen circumstances beyond the control of the permittee.
NR 243.14(7)(d)1.c.
c. The permittee has notified the department verbally prior to the emergency application. Unless necessitated by imminent impacts to the environment or human or animal health, the permittee may not apply manure to a field on an emergency basis until the department has verbally approved the application.
NR 243.14(7)(d)1.d.
d. The permittee submits a written description of the emergency application and the events leading to the emergency application to the department within 5 days of the emergency application.
NR 243.14(7)(d)2.
2. Allowances for emergency surface applications of liquid manure do not apply to situations where a permittee has failed to properly maintain storage capacity either through improper design or management of the storage facility, including failure to properly account for the number or volume of wastestreams entering the facility, failure to empty a storage or containment facility in accordance with permit conditions prior to the onset of frozen or snow covered ground conditions or due to an increase in animal units.
NR 243.14 Note
Note: The allowance for emergency surface applications in compliance with permit conditions is intended to avoid more significant impacts to human health and water quality associated with uncontrolled overflows of manure storage facilities. Causes of emergency surface applications could include conditions such as prolonged storm events or early onset of frozen ground conditions that preclude applications of manure prior to the onset of frozen or snow covered ground conditions provided that the operation made all other attempts to maintain storage volume before an emergency application became necessary.
NR 243.14(7)(d)3.
3. The permittee shall conduct emergency surface applications of liquid manure in accordance with the restrictions in Table 5. The permittee may only conduct emergency surface applications on fields that the department has approved for emergency applications, in writing, as part of a nutrient management plan. The department may approve alternate fields and impose alternative restrictions, in writing and on a case-by-case basis, if fields that meet the restrictions in Table 5 are not available at the time of the emergency application, the permittee has explored all other options identified in its emergency response plan and the application results in a winter acute loss index value of 4 or less using the phosphorus index.
NR 243.14 Note
Note: The winter acute loss index value is displayed under the heading “Acute Loss Frozen Soil PI" in the cropping screen of the Snap-Plus nutrient management software program.
NR 243.14 Note
Note: Reporting requirements for emergency surface applications are contained in s.
NR 243.19.
NR 243.14(7)(e)
(e)
Existing source CAFOs-liquid manure exception. Prior to January 1, 2010, if an existing source CAFO does not have 180 days of storage for liquid manure as specified in s.
NR 243.15, the permittee may surface apply liquid manure on frozen or snow covered ground in accordance with the restrictions in Table 5 without satisfying the emergency criteria in par.
(d). If a permittee does not have access to sites that meet the criteria in Table 5, the department may approve alternate sites and restrictions, in writing on a case-by-case basis as part of a nutrient management plan provided the application results in a winter acute loss index value of 4 or less using the phosphorus index. This allowance for existing source CAFOs to surface apply liquid manure on frozen or snow covered ground without satisfying the emergency criteria in par.
(d) is not applicable after January 1, 2010.
NR 243.14 Note
Note: An existing source CAFO is defined under s.
NR 243.03 (23).
NR 243.14(7)(f)
(f)
Frozen liquid manure. Liquid manure that is frozen and cannot be transferred to a manure storage facility may be surface applied on frozen or snow-covered ground in accordance with the restrictions in Table 5. Surface applications of frozen liquid manure do not require prior department approval or notification provided application sites for frozen liquid manure are identified in the approved nutrient management plan. During February and March, the permittee shall notify the department if the permittee expects to surface apply frozen liquid manure more than 5 days in any one month.
NR 243.14 Note
Note: Applications of frozen manure under par. (f) are limited to times when the operation's manure handling system is not functioning due to very cold weather.
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See PDF for table NR 243.14(8)
(8) Identification of sites. The permittee shall submit sites that meet or are expected to meet the criteria in Tables 4 and 5 for manure and the criteria in s.
NR 214.17 (2) to
(6) for process wastewater to the department for review and approval as part of its nutrient management plan. In addition, the permittee shall evaluate each field at the time of application to determine if conditions are suitable for applying manure and complying with the requirements of this section. All surface applications of manure or process wastewater on frozen or snow-covered ground shall occur on those fields that represent the lowest risk of pollutant delivery to waters of the state and where the application results in a winter acute loss index value of 4 or less using the phosphorus index.
NR 243.14(9)
(9) Adequate storage. All permittees shall have and maintain adequate storage for all manure and process wastewater generated at the operation to ensure that wastes can be properly stored and land applied in compliance with the conditions and timing restrictions of the permit, nutrient management plan and this chapter. As part of the nutrient management plan, the permittee shall provide the department with documentation that it has adequate storage and methods of maintaining adequate storage for manure and process wastewater generated at the operation. For liquid manure, adequate storage means a minimum of 180 days of storage designed and maintained in accordance with ss.
NR 243.15 (3) (i) to
(k) and
243.17 (3) and
(4).
NR 243.14(10)
(10) Additional restrictions. The department may require the permittee to implement practices in addition to or that are more stringent than the requirements specified in this section when necessary to prevent exceedances of groundwater quality standards, prevent impairments of wetland functional values, prevent runoff of manure or process wastewater during dry weather conditions or to address previous manure or process wastewater runoff events or discharges from a site to waters of the state that occurred despite compliance with this section and the conditions of a WPDES permit. These conditions may include additional restrictions on nitrogen and phosphorus loadings or other nutrients and pollutants associated with the manure or process wastewater, injection or incorporation requirements, restrictions on winter landspreading, distribution schedules, and other management or site restrictions. The department may also consider nutrient management conditions contained in ch.
ATCP 50 as well as the following site-specific factors when developing permit conditions or reviewing and approving the nutrient management plan or any proposed amendments to an approved nutrient management plan:
NR 243.14(10)(a)
(a) Soil limitations such as permeability, infiltration rate, drainage class and flooding hazard.
NR 243.14(10)(d)
(d) Nutrient requirements of the crop or crops to be grown on the fields utilizing the manure.
NR 243.14(10)(f)
(f) Potential impacts to waters identified as source water protection areas.
NR 243.14(10)(g)
(g) Potential impact to groundwater in areas with direct conduits to groundwater, shallow soils over bedrock, highly permeable soils and shallow depth to groundwater.
NR 243.14 History
History: CR 05-075: cr.
Register April 2007 No. 616, eff. 7-1-07;
correction in (7) (c) made under s. 13.92 (4) (b) 1., Stats., Register March 2019 No. 759.
NR 243.141(1)(1)
Stacking to avoid surface applications in February and March. For solid manure with a solids content of 16% or greater, the department may approve stacking of the manure outside of a department approved manure storage facility where a permittee chooses to stack solid manure in accordance with s.
NR 243.14 (6) (d). Permittees choosing to stack solid manure under s.
NR 243.14 (6) (d) shall land apply all stacked manure from a site within 8 months of the date when stacking first began at the site.
NR 243.141(2)
(2) Other stacking allowances. For periods when the ground is not frozen or snow-covered, the department may approve stacking of solid manure with a solids content of greater than 32% outside of a department approved manure storage facility on a case-by-case basis as allowed under a WPDES permit. Factors the department shall consider when approving stacking of solid manure on a case-by-case basis include the potential for leachate or runoff from the stack causing exceedances of surface water or groundwater quality standards or impairments to wetland functional values, information submitted or proposed to be submitted by the permittee outlining leaching and runoff characteristics of the manure, and practices to be implemented by the permittee to minimize the potential for leachate or runoff from the stack such as limiting the frequency, volume of manure to be stacked and length of stacking period.
NR 243.141(3)
(3) Stacking conditions. All proposed stacking sites shall be reviewed and approved by the department and identified in the permittee's nutrient management plan. Stacking approvals may be rescinded based on documented impacts to waters of the state at or from the stacking site. Stacking may only be approved provided the following requirements are met:
NR 243.141(3)(a)
(a) When piled in a stack, the solid manure stack must be able to maintain its shape with minimal sloughing such that an angle of repose of 45 degrees or greater is maintained when the manure is not frozen.
NR 243.141(3)(b)
(b) Stacking of solid manure outside of a department approved manure storage facility shall, at a minimum, meet the specifications in NRCS Standard 313, Table 9, dated December 2005. Alternatively, stacks may be placed on sites with soils in the hydrologic soil group D provided the manure has a solids content of greater than 32% and all other criteria in NRCS Standard 313, Table 9, dated December 2005, are met. NRCS Standard 313, dated December 2005, is incorporated by reference in s.
NR 243.07.
