FNMP2.net

Joe Harrisonjhharrison@wsu.edu

Whole Farm Nutrient Management Needs to be considered at the Whole Farm Level and Beyond

Most dairies are net importers of nutrients

ManureExported

Nutrient Inputs

Inputs

• Feed

• Animals

• IrrigationWater

• Fertilizer

• Legume N

• Bedding

FarmBoundary

Managed Nutrient Outputs

Inputs

FarmBoundary

ManagedOutputs

Milk&Meat

Crops

Manure

Recycling of Nutrients

Inputs

FarmBoundary

Feed M anure

M anagedO utpu ts

Losses o r S o il S to rage

Losses to air

nitrification

Organic Nitrogen

Den

itrifi

catio

nLe

achi

ng

Vola

tiliz

atio

n

NitrateNO3

-Ammonium

NH4+

N2 or N2O

PlantUptake

NH3

AmmoniaN Cycle

To surface water

Feed Management (precision feeding)- Better targeted protein requirement- Lower phosphorus in diet- Multiple rations -

Capture phosphorus in easily exported form

Feed ManagementAs a result of precision feeding,imported nutrients can be decreased

Selection of forage type and acreage can impact need for imported nutrients

E Q IP Funds