Resource Management

NMP- Nutrient Management Plan

A written site specific plan that incorporates the best management practices (BMPs) to manage the use of manure and other plant nutrients for crop production and water quality protection consistent with the criteria established under Act 38 and Chapter 130b. All CAOs and CAFOs are required to have Act 38 Nutrient Management Plans developed.


CAO- Concentrated Animal Feeding Operation

An animal operation that has greater than two AEUs/acre. All managed ground, both owned and rented is to be included in this calculation. This program is regulated by the State Conservation Commission.


AEU- Animal Equivalent Units

1000 lbs. of live weight of livestock or poultry animals, on an annualized basis, regardless of the actual number of individual animals comprising the unit. Some Animal Unit examples are:
  • Milk Cos (Holstein) – 1.3 AU
  • Heifer (Holstein) – 0.9 AU
  • Calf (Holstein) – .375 AU
  • Finishing Pig – .155 AU
  • Layer – .0038 AU


CAFO- Concentrated Animal Feeding Operation

Any operation with greater than 1000 AEUs, or is a CAO with greater than 300 AEU, or any operation exceeding any of the following animal threshold numbers:
  • 700 mature dairy cows
  • 1,000 veal calves
  • 1,000 mature cattle
  • 2,500 swine (greater than 55 lbs.)
  • 10,000 swine (less than 55 lbs.)
  • 55,000 turkeys
  • 125,000 broilers or pullets
  • 82,000 laying hens
  • 5,000 ducks (if using a liquid manure handling system)
  • 30,000 ducks (if using a dry manure handling system)


NBS- Nutrient Balance Sheet

A site specific plan meeting the requirements established by the SCC under Act 38, and used to determine the appropriate manure application rates for importing farms. There are four NBS options (ordered from least expensive to most expensive).
  1. Manure applications are balanced with the phosphorous removal of the crop. This option does not require soil samples, but is not practical if the manure has a high phosphorus value.
  2. Manure applications are balanced with the nitrogen usage of the crop if soil sample results are less then 200 ppm. This option requires soil samples and is a good option if fields soil test under 200 ppm.
  3. The Phosphorus Index is utilized to evaluate fields and manure applications may be based on nitrogen usage of the crop. This option is not recommended due to the time and the results are not guaranteed to be better than options 1 & 2.
  4. Act 38 approved. NMP.


OMP- Odor Management Plan

A site specific plan identifying the Odor BMPs to be implemented to manage the impact of odors generated from the animal housing and manure management facilities located, or to be located, on the site. Only CAOs or CAFOs erecting, constructing, or expanding an animal housing facility or manure management facility are required to obtain odor management plans.


BMP- Best Management Practice

A practice or combination of practices, technologies, or standards to manage environmental impacts from agriculture.