Presented by: Charlie Walker

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Innovations For Environmentally Sound Nutrient
Management

• Presented by Charlie Walker
• Product Innovation Manager

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Better Nutrient Management Better Nutrient
Efficiency Higher Returns to Farmers

• Reduction of
• run off of water soluble phosphorus
• leaching, denitrification volatilisation of
  nitrogen
• Are all achievable in a perfect world using
  existing products.
• But are they logistically achievable?
• They are now.

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BiophosTM An alternate phosphorus product

• The problem
• - losses from water soluble surface applied P
• - ineffective organic based P fertilisers
• The cause
• - high solubility of conventional fertilisers
  increase losses in surface run off
• - organic P sources little or no plant available
  P
• The cure BiophosTM
• - organic compost using native soil fungi to
  mimic conventional fertiliser process

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Dry matter production of clover ryegrass pasture
after three seasons at Tatura
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The new nitrogen technology

• The problem
• - leaching losses of nitrate nitrogen
• - gaseous losses of nitrous oxide
• The cause
• - rapid nitrification of ammonium based
  fertilisers into nitrate
• The cure
• - suppression of Nitrosomonas spp in the soil
• - ammonium nutrition

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Interaction between
treatment N application timing at 3 sites in
SE Australia 2004

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GreenUrea
Economic reduction in urea volatilisation

• The problem
• - Significant losses of surface applied urea to
  atmosphere under certain conditions
• The cause
• - Urease enzyme activity leading to
  volatilisation
• - Lag time between application and incorporation
• The cure
• - Enzyme suppression to delay hydrolysis of urea
• - Extra time for incorporation of urea by rain,
  irrigation or cultivation.

GreenUrea
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Volatilisation Experiments

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