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Comprehensive Nutrient Management Plan
(CNMP)
What is a CNMP?
A CNMP is a "Conservation (Farm) Plan" specific
to Animal Feeding Operations (AFO). The CNMP addresses the management and
treatment necessary for the AFO to meet their production goals and protect soil
and water resources on the farm and leaving the farm.
Why CNMPs?
The CNMP process is part of a national strategy
by USDA and USEPA to better address the resource concerns with animal feeding
operations, preserve the livestock industry, create a more uniform planning
system nation-wide.
CNMP Certification:
CNMPs may need to be approved by a "certified" technical
service provider. The certification program is currently under development at
the national and state level.
What does a CNMP contain?
The CNMP normally contains 6 different elements
as shown above and highlighted below:
- Manure and Wastewater Handling and Storage:
how manure and runoff are managed at the facility;
- Land Treatment Practices: the treatment
and practices that will be applied on the land receive manure;
- Nutrient Management Plan: the time,
rates, forms, and methods of application of manure and other fertilizers;
- Record Keeping: how and what records
the producer maintains;
- Feed Management Considerations: feed
ration and management considerations to reduce manure nutrient contents;
- Other Waste Utilization Options:
alternative use of manure when there is not sufficient land available for manure
application.
Nutrient
Management Element of a CNMP (element 3)
The nutrient management element of the CNMP, as defined by USDA
NRCS, contains nine components (listed below) to be included as part of the
element’s plan. This plan is used when manure and other organic nutrients (along
with other sources of nutrients) are land-applied for production of food, fiber,
or forage.
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Provide site maps, including a soil map: These maps are
generally part of the overall conservation plan, and can be aerial
photographs, computer generated, geographic information system (GIS) maps and
printouts, hand-drawn sketches, or any another acceptable form. Information
will be given for the land where nutrients are to be applied. This information
will include field boundary and acreage, location of any sensitive areas, soil
types present and their associated soil interpretation, plus any other
pertinent information.
Location and description of sensitive resource areas:
If
present, sensitive resource areas will be delineated on the site map.
Sensitive areas may be highly erodible land (HEL), sole-source aquifer
recharge areas, soils that are highly leachable, fields that have a high risk
for phosphorus transport, or areas in close proximity to neighbors or public
areas. Sensitive areas usually require some form of reduced or restricted
nutrient application. Assessment tools and maps to determine sensitive areas
are available in the NRCS Field Office Technical Guide (FOTG).
Soil, plant, water, and organic material sample analysis
results:
Nutrient management is based on crop requirements and the
resources available to supply these crop nutrients. All appropriate sample
analyses will be part of the nutrient management component. These analyses
become basic information to complete the nutrient budget. Appropriate
explanation of each analysis needs to be presented to the producer.
Current and planned crop production sequence or crop rotation:
Nutrient application is based on crop requirements. Planning the crop
rotation will determine the nutrient needs, nutrient carryover to subsequent
crops, and windows of opportunity to apply organic waste material. A three to
five year history of past, present, and future crops is essential for planning
nutrient management.
Expected yield:
The expected crop yield is a basis for
determining the level of nutrients required for that particular crop.
Generally, the higher the yield the higher the nutrient
requirement. There are a number of methods available to determine expected
yield. Soil, climate, crop variety, and management skills are all factors.
Consult with the land grant university for those acceptable methods used in
the area.
Quantification of all nutrient sources available:
Nutrient
sources may include soil reserves, commercial fertilizer, animal manure and
other organic waste products, irrigation water, atmospheric deposition, and
legume credits. Many of the estimates of nutrient sources are determined by
laboratory analysis or crop history.
Develop a nutrient budget for the crop rotation being planned:
A nutrient budget determines the amount of nutrients available from all
sources and compares this to the amount of nutrients required to meet the
expected yield. If the crop yield requirement for nutrients exceeds the
currently available sources, then an additional source of nutrients is needed.
If nutrient supplies exceed crop requirements, however, then management
measures must be taken to ensure the excess nutrients are either reduced or
their application will not cause detrimental effects to plants, soil, water,
or air resources.
Recommended rates, timing, and method of nutrient application:
These are the three specifications for nutrient application that are given
to the producer. All three specifications are part of the nutrient management
element plan. The rate of nutrient application depends on the results of the
nutrient budget. Timing is determined by crop growth stage, field conditions
for application equipment, and climatic conditions that can affect the
transformation and transport of nutrients. How the nutrient is applied will be
based on its form and consistency, soil and weather conditions, and potential
for movement or loss to the environment.
Operation and maintenance of the nutrient management plan:
A number of management items need to be reviewed and updated on a regular
basis. Soil tests will be taken periodically to track soil reserves.
Application equipment will be calibrated to supply uniform and precise amounts
of nutrients. A safe working environment will be maintained while handling and
storing nutrient products. Records of nutrient application also will be kept
by the producer.
For More Information please visit the
following web sites:
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OSU Poultry
Waste Management Website
Poultry Litter
Marketing Program
CAFO Factsheets
OCES Water
Quality Program
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