Volatilization Losses from Sprinkler Applied Nitrogen Blythe McAfee
Application Techniques • Sprinkler irrigation • Gravity irrigation • Micro irrigation • Surface spreading • Injection www.farmprogress.com, www.watercenter.unl.edu, www.nelsonirrigation.com
Ammonium Ammonia + + NH 4 NH 4 + NH 4 NH 3 NH 3 NH 3 + NH 4 + NH 4 + NH 4 + NH 4
+ NH 4 NH 3 NH 3 + NH 4 NH 3 + NH 4 NH 3 NH 3 + NH 4 NH 3 + NH 4 + NH 4 NH 3 + NH 4 + NH 4 NH 3 + NH 4 + + NH 4 NH 4 + NH 4 NH 3 NH 3 + NH 4 + NH 4 + + NH 4 NH 4 NH 3 + NH 4 + NH 4 + NH 4 + NH 4 + NH 3 NH 4 NH 3 + + NH 3 NH 4 NH 4 NH 3 NH 3 NH 3 + + NH 4 NH 4 + NH 4 + NH 4 + NH 3 NH 4 NH 3 + NH 4 NH 3 NH 3 + NH 4
Environmental Factors Soil Weather • pH • Wind speed • Temperature • Humidity • Soil texture • Atmospheric temperature • Water content
Which Factors Increase Volatilization? Acidic (low pH) Alkaline (high pH) Fine Soils Coarse Soils Wet Soil Dry Soil Low Temps High Temps Low Wind Speeds High Wind Speeds Low Humidity High Humidity
How much do we lose?
My Research
Which Increase Volatilization? Acidic (low pH) Alkaline (high pH) Fine Soils Coarse Soils Wet Soil Dry Soil Low Temps High Temps Low Wind Speeds High Wind Speeds Low Humidity High Humidity
• Nebguide G1335 • http://water.unl.edu/manure/
Thank you! Questions?
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