Potential of Using Precision Agricultural Practices for P Fertilizer Management

Animal Manure Application to Agricultural Lands  Animal Manure is added to Agricultural lands as a Nitrogen Fertilizer Source  After Many Years of Application of Manure on a Nitrogen content Basis, Phosphorous Builds up in the Soil

Water Quality Concerns  Eutrophication Algal Blooms Algal Blooms Fish Kills Fish Kills Poor Quality Water Poor Quality Water  Pfiesteria Toxic Dinoflagellate Toxic Dinoflagellate Lesions on Fish Lesions on Fish Can be Harmful to Human Health Can be Harmful to Human Health

Algae Bloom

Phosphorous  Phosphorous is an Immobile Nutrient.  Yet, at High Soil Test P levels there can be soluble P in Run off.  Also, Erosion of Soil Containing High Levels of Phosphorous can Result in the Release of soil P to a Water Body

How can Precision Agriculture Practices be Useful  Need to Know how much Phosphorous is reaching Sensitive Water Bodies  Will Phosphorous dissolve in water body

How can Precision Agriculture Practices be Useful  Geographic Information Systems can be used to Determine the Impact High Soil Phosphorous in a Field will have on Sensitive Water Bodies

How can Precision Agriculture Practices be Useful  Soil Data Soil Test P Soil Test P Erodability Erodability Phosphorous Adsorption Capacity Phosphorous Adsorption Capacity  Cropping System Pasture vs. Row Crop Pasture vs. Row Crop

How can Precision Agriculture Practices be Useful  Landscape Position Distance from Water Body Distance from Water Body Slope Slope Drainage Patterns Drainage Patterns  Management Practices  Timing and Frequency of Manure Application  Buffer stripes

How can Precision Agriculture Practices be Useful  Information on Water Bodies Are the Water Bodies Sensitive to Phosphorous addition. Are the Water Bodies Sensitive to Phosphorous addition. If so, How Sensitive If so, How Sensitive  Maximum Daily loads

Conclusion Soil and Manure Transport Water Body