Applying the correct amount and form of plant nutrients for
optimum crop yield and minimum impact on water quality; includes manure testing
and waste utilization.
How it works
Crop nutrients are determined after taking a soil test, setting
realistic yield goals, and taking credit for contributions from previous years’
crops and manure applications. Nutrients are then applied at the proper rate and
time by the proper application method. Nutrient sources include animal wastes,
commercial fertilizers, and compost. These steps reduce the potential for
nutrients to go unused and run off or infiltrate into water supplies.
How it helps
Protects water quality by preventing over-application of
commercial fertilizers and animal manure
Correct manure application on all fields can improve soil
tilth and organic matter
Reduces the need for additional applications, reducing input
costs and energy
Have you tested soil and manure for nutrient levels?
Are organic wastes available for you to use?
Are yield goals realistic?
Are proper soil conservation measures installed?
Have you accounted for nitrogen credits produced by legume
Choose the best application method. Use broadcast, starter,
or surface band injection.
Use Oregon State University (OSU) Extension fertilizer guides for your
crops to guide applications.
Refrain from applying commercial nitrogen in the fall,
except when nitrogen is associated with phosphorous application.
Avoid applying manure on frozen, saturated or snow-covered
ground if possible.
Test soils once every three years or according to OSU Extension
Analyze manure and other organic waste for nutrient content
before field application.
Establish a winter cover crop if there is a possibility of
nitrogen leaching because of poor crop yield.
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