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 Note Note: Also see s. NR 217.04 (1) (a) 5.

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) (c) High-risk runoff period.

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(6)(c)1.a. a. Snow is present to a depth of one inch or greater.

NR 243.14(6)(c)1.b. b. The ground is frozen.

NR 243.14(6)(d) (d) To meet the requirements of par. (c), a permittee may choose to stack solid manure generated at a production area location in accordance with s. NR 243.141 (1) rather than use a storage facility that meets the design requirements in s. NR 243.15.

- See PDF for table

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.