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ATCP 50.91   Terrace systems.
ATCP 50.92   Underground outlets.
ATCP 50.93   Waste transfer systems.
ATCP 50.94   Wastewater treatment strips.
ATCP 50.95   Water and sediment control basins.
ATCP 50.96   Waterway systems.
ATCP 50.97   Well decommissioning.
ATCP 50.98   Wetland development or restoration.
Ch. ATCP 50 Note Note: Chapter Ag 166 was renumbered ch. ATCP 50 under s. 13.93 (2m) (b) 1., Stats., Register, April, 1993, No. 448. Chapter ATCP 50 was repealed and recreated, Register, November, 1996, No. 491, eff. 12-1-96; corrections in ch. ATCP 50 made under s. 13.93 (2m) (b) 7., Stats., Register, November, 1996, No. 491. Chapter ATCP 50 as it existed on September 30, 2002 was repealed and a new chapter ATCP 50 was created effective October 1, 2002.
Ch. ATCP 50 Note Note: This chapter implements Wisconsin's soil and water resource management program under ch. 92, Stats. The department of agriculture, trade and consumer protection administers the program in cooperation with county land conservation committees, the land and water conservation board, the department of natural resources, and other state and federal agencies. The program has the purposes specified under s. 92.14 (2), Stats.
Ch. ATCP 50 Note Note: The rule revision that was published in the May, 2007 Wis. Adm. Register applies to small businesses as defined in s. 227.114 (1), Stats., on August 1, 2007.
subch. I of ch. ATCP 50 Subchapter I — Definitions and General Provisions
ATCP 50.01 ATCP 50.01Definitions. In this chapter:
ATCP 50.01(1) (1) “Agricultural practice" means beekeeping; commercial feedlots; dairying; egg production; floriculture; fish or fur farming; grazing; livestock raising; orchards; poultry raising; raising of grain, grass, mint, or seed crops; raising of fruits, nuts, or berries; sod farming; placing land in federal programs in return for payments in kind; owning land, at least 35 acres of which is enrolled in the conservation reserve program under 16 USC 3831 to 3836; or vegetable raising.
ATCP 50.01(2) (2) “Conservation practice" means a facility or practice that is designed to prevent or reduce soil erosion, prevent or reduce nonpoint source water pollution, or achieve or maintain compliance with soil and water conservation standards. “Conservation practice" includes a nutrient management plan.
ATCP 50.01(2m) (2m) “Contaminated runoff" means drainage that has come through or across a feed storage or manure storage area. “Contaminated runoff" includes the liquid and any sediment, manure, feed, or other material carried in the liquid.
ATCP 50.01 Note Note: “Contaminated runoff" contains lower concentrations of contaminants than leachate from feed or manure.
ATCP 50.01(3) (3) “Cost-shared practice" means a conservation practice financed by a cost-share grant.
ATCP 50.01(4) (4) “Cost-share grant" means a grant that reimburses a landowner for all or part of the cost to install or maintain a conservation practice identified in the grant.
ATCP 50.01 Note Note: See s. ATCP 50.40.
ATCP 50.01(5) (5) “County drainage board" means a board created and appointed under s. 88.17, Stats.
ATCP 50.01(6) (6) “County land conservation committee" means the committee created by a county board under s. 92.06, Stats. “County land conservation committee" includes employees or agents of a county land conservation committee who, with committee authorization, act on behalf of the committee.
ATCP 50.01(7) (7) “CREP program" means the combined state-federal conservation reserve enhancement program under s. 93.70, Stats. and 16 USC 3834(f)(4).
ATCP 50.01(8) (8) “Department" means the state of Wisconsin department of agriculture, trade and consumer protection.
ATCP 50.01(9) (9) “DNR" means the state of Wisconsin department of natural resources.
ATCP 50.01(10) (10) “Farm" means a parcel of land on which a landowner conducts one or more agricultural practices.
ATCP 50.01(12) (12) “Individual" means a natural person.
ATCP 50.01(13) (13) “Lake district" means a public inland lake protection and rehabilitation district created under subch. IV of ch. 33, Stats.
ATCP 50.01(14) (14) “Land out of agricultural production" means acreage that the owner can no longer use for normal crop or livestock production. Land is not taken “out of agricultural production," for purposes of s. ATCP 50.08, if the landowner is free to use it for pasture, hay production, and cropping subject to residue management.
ATCP 50.01(15) (15) “Landowner" means any of the following:
ATCP 50.01(15)(a) (a) A person who owns a parcel of land.
ATCP 50.01(15)(b) (b) A person who rents, controls, or uses a parcel of land for agricultural purposes.
ATCP 50.01(15m) (15m) “Leachate" means the concentrated liquid which has percolated through, or drained from, animal feed or manure storage areas.
ATCP 50.01 Note Note: “Leachate" contains much higher concentrations of contaminants than contaminated runoff.
ATCP 50.01(16) (16) “Livestock operation" means a feedlot or other facility or pasture where animals are fed, confined, maintained, or stabled.
ATCP 50.01(17) (17) “Local governmental unit" has the meaning given in s. 92.15 (1) (b), Stats., and includes a county, town, city, village, lake district, and county drainage board.
ATCP 50.01(18) (18) “Local regulation" means any of the following regulations that require conservation practices on farms:
ATCP 50.01(18)(a) (a) Soil and water conservation standards that a county land conservation committee adopts under s. 92.07 (2), Stats.
ATCP 50.01(18)(b) (b) An ordinance or regulation that a county adopts under s. 59.69, 59.692, 92.07 (2), 92.11, 92.15, 92.16, 92.17, or 93.90, Stats., or under other county authority.
ATCP 50.01(18)(c) (c) An ordinance or regulation that a town, city, or village adopts under s. 92.11, 92.15, 92.16, 92.17, or 93.90, Stats., or under other town, city, or village authority.
ATCP 50.01(18)(d) (d) A regulation adopted by a county drainage board, a lake district, or other special purpose district, or a tribe.
ATCP 50.01(19) (19) “LWCB" means the state of Wisconsin land and water conservation board.
ATCP 50.01(20) (20) “Manure" means livestock excreta. “Manure" includes the following when intermingled with excreta in normal farming operations: debris including bedding, water, soil, hair, and feathers; processing derivatives including separated sand, separated manure solids, precipitated manure sludges, supernatants, digested liquids, composted biosolids, and process water; and runoff collected from barnyards, animal lots, and feed storage areas.
ATCP 50.01(21) (21) “Manure management system" has the meaning given in s. ATCP 50.62 (1) (b).
ATCP 50.01(22) (22) “Manure storage facility" has the meaning given in s. ATCP 50.62 (1) (c).
ATCP 50.01(23) (23) “Manure storage structure" has the meaning given in s. ATCP 50.62 (1) (d).
ATCP 50.01(24) (24) “Nonpoint source" has the meaning given in s. 281.65 (2) (b), Stats.
ATCP 50.01 Note Note: Section 281.65 (2) (b), Stats., defines a “nonpoint source" as “a land management activity which contributes to runoff, seepage, or percolation, which adversely affects or threatens the quality of waters of this state, and which is not a point source as defined under s. 283.01 (12)."
ATCP 50.01(25) (25) “Nonpoint source water pollution" has the meaning given in s. 281.16 (1) (f), Stats.
ATCP 50.01 Note Note: Section 281.16 (1) (f), Stats., defines “nonpoint source water pollution" as “pollution of the waters of the state that does not result from a point source, as defined in s. 283.01 (12)."
ATCP 50.01(26) (26) “NRCS" means the natural resources conservation service of the United States department of agriculture.
ATCP 50.01(27) (27) “NRCS technical guide" means the NRCS field office technical guide.
ATCP 50.01 Note Note: Copies of the NRCS technical guide are on file with the department and the legislative reference bureau. Copies of individual standards contained in the NRCS technical guide may be obtained from a county land conservation department, an NRCS field office, the national NRCS website at:, or Wisconsin NRCS website at:
ATCP 50.01(28) (28) “Nutrient management plan" means any of the following:
ATCP 50.01(28)(a) (a) A plan required under s. ATCP 50.04 (3) or 50.62 (5) (f).
ATCP 50.01(28)(b) (b) A farm nutrient plan prepared or approved, for a landowner, by a qualified nutrient management planner.
ATCP 50.01 Note Note: A nutrient management plan must comply with s. ATCP 50.04 (3).
ATCP 50.01(29) (29) “Nutrients" means plant nutrients derived from commercial fertilizers, manure, organic wastes, soil reserves, legumes, or other sources.
ATCP 50.01(29m) (29m) “Pasture" has the meaning given in s. NR 151.015 (15m).
ATCP 50.01(30) (30) “Person" means an individual, corporation, partnership, cooperative association, limited liability company, trust, or other legal organization or entity.
ATCP 50.01(31) (31) “RUSLE 2 equation" means the following applicable NRCS release of version 2 of the revised universal soil loss equation:
ATCP 50.01(31)(a) (a) Except as provided in par. (b), the release that was in effect on May 1, 2014.
ATCP 50.01(31)(b) (b) For purposes of a compliance determination under ch. NR 151 or this chapter made prior to May 1, 2014, the release that was in effect on the date of the compliance determination.
ATCP 50.01(32) (32) “Secretary" means the secretary of the department.
ATCP 50.01(33) (33) “State regulation" means ch. 88, 91, 92, 93, 281, or 283, Stats., and rules promulgated by the department or DNR under ch. 88, 91, 92, 93, 281, or 283, Stats.
ATCP 50.01(34) (34) “Structural height" means the difference in elevation in feet between the point of lowest elevation of the structure or embankment before overtopping and the lowest elevation of the natural stream or lake bed at the downstream toe of the structure or embankment.
ATCP 50.01(35) (35) “Tribe" has the meaning given in s. 165.91 (1), Stats.
ATCP 50.01(36) (36) “T-value" means the maximum average annual rate of soil erosion for each soil type that will permit a high level of crop productivity to be sustained economically and indefinitely.
ATCP 50.01(37) (37) “Unconfined manure pile" means a quantity of manure, at least 175 cu. ft. in volume, that covers the ground surface to a depth of at least 2 inches and is not confined within a manure storage facility, livestock housing facility, or barnyard runoff control facility.
ATCP 50.01 Note Note: A typical 140 bushel manure spreader contains about 175 cu. ft. of manure.
ATCP 50.01(38) (38) “Waters of the state" has the meaning given in s. 283.01 (20), Stats.
ATCP 50.01(39) (39) “Weighted average soil rental rate" means, for each county, the rate determined by the United States department of agriculture, farm service agency, on form CRP-2.
ATCP 50.01 History History: CR 01-090: cr. Register September 2002 No. 561, eff. 10-1-02; CR 04-005: r. and recr. (31) Register October 2004 No. 586, eff. 11-1-04; correction in (35) made under s. 13.93 (2m) (b) 7., Stats., Register November 2006 No. 611; CR 08-075: am. (31) Register April 2009 No. 640, eff. 5-1-09; CR 13-016: cr. (2m), r. (11), cr. (15m), am. (17), (18) (a) to (c), (20), cr. (29m), am. (31) (a), (b), (33) Register February 2014 No. 698, eff. 5-1-14.
ATCP 50.02 ATCP 50.02Waivers. The department may grant a written waiver from any provision of this chapter if the department finds that the waiver is necessary to achieve the objectives of this chapter. The secretary shall sign each waiver under this section. The department may not waive a statutory requirement.
ATCP 50.02 History History: CR 01-090: cr. Register September 2002 No. 561, eff. 10-1-02.
subch. II of ch. ATCP 50 Subchapter II — Soil and Water Conservation on Farms
Subch. II of ch. ATCP 50 Note Note: Under s. 281.16, Stats., DNR is primarily responsible for adopting performance standards to prevent pollution runoff from farms. The department of agriculture, trade and consumer protection (“DATCP") must prescribe conservation practices to implement the DNR performance standards. DATCP must also establish soil conservation and farm nutrient management requirements. This subchapter spells out a single set of farm conservation practices that incorporates DNR performance standards by reference. Counties play a major role in implementing conservation practices on farms (see subchapter III of this chapter). Conservation requirements are contingent on cost-sharing (see s. ATCP 50.08).
ATCP 50.04 ATCP 50.04Farm conservation practices. Except as provided in s. ATCP 50.08, a landowner engaged in agricultural practices in this state shall implement the following conservation practices:
ATCP 50.04(1) (1)Nonpoint source pollution control. A landowner shall implement conservation practices that achieve compliance with DNR performance standards under ss. NR 151.02 to 151.08, in effect on May 1, 2014. A nutrient management plan developed in accordance with sub. (3) may be used to demonstrate compliance with s. NR 151.04.
ATCP 50.04 Note Note: Landowners who claim farmland preservation tax credits must comply with conservation standards as required under s. 91.80, Stats.
ATCP 50.04(2) (2)Soil erosion control. A landowner shall manage all fields including pastures, and related field practices, so that soil erosion rates on cropped and pastured soils do not exceed T-value.
ATCP 50.04 Note Note: See s. 92.025 (1), Stats., and s. NR 151.02. Soil erosion includes erosion caused by wind or water. For most soils, “T-value" is equivalent to 2 to 5 tons of soil loss per acre per year.
ATCP 50.04 Note Sheet and rill soil erosion from water is calculated according to the RUSLE 2 equation, published by NRCS. Wind erosion is calculated according to the NRCS Wind Erosion Prediction System (WEPS) model. Copies of RUSLE 2 and the NRCS WEPS model are on file with the department and the legislative reference bureau. Copies of both models may also be obtained from the NRCS website at:
ATCP 50.04(3) (3)Nutrient management plan.
ATCP 50.04(3)(a)(a) A landowner shall have and follow an annual nutrient management plan when applying nutrients to any field, including pastures, after the date specified in par. (h). A nutrient management plan shall comply with this subsection.
ATCP 50.04(3)(b) (b) The plan shall include every field on which nutrients are applied, including pastures, and pastures stocked at an average rate of more than one animal unit per acre during the grazing season. Pastures are not required to be included in the plan if all of the following requirements are met:
ATCP 50.04(3)(b)1. 1. The pastures are stocked at an average stocking rate of one animal unit per acre or less at all times during the grazing season.
ATCP 50.04(3)(b)2. 2. The pastures do not receive mechanical applications of nutrients.
Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.