Scoop has an Ethical Paywall
Work smarter with a Pro licence Learn More

Video | Agriculture | Confidence | Economy | Energy | Employment | Finance | Media | Property | RBNZ | Science | SOEs | Tax | Technology | Telecoms | Tourism | Transport | Search

 

Stopping the rain from washing away dairy farmers’ profits

19 September 2016

Stopping the rain from washing away dairy farmers’ profits

Dairy farmers who have been experiencing wet weather could be facing unexpected soil nutrient loss due to a common misconception about how urea fertiliser behaves when soils are moist from previous rainfall events.

This misconception is based on a common belief that volatilisation, the process where nitrogen is lost through conversion into ammonia gas, is minimised if urea fertiliser is applied to moist soils or before a heavy dew or light rain.

Ballance Agri-Nutrients Science Manager Aaron Stafford says that while he can’t predict the weather, the good news is that a strategic look at your nitrogen fertiliser applications and some smart science can help to get the best from your investment, rain or shine.

“Just because it’s been wet doesn’t mean that volatilisation from urea will be negated – contrary to popular belief, nitrogen losses actually increase with increasing soil moisture,” says Mr Stafford.
“This is because urea fertiliser is rapidly converted to ammonium, especially when applied to moist soil. And once in the ammonium form, nitrogen will be retained close to the soil surface and will not be washed deeper into the soil with subsequent rainfall, therefore increasing the amount of nitrogen available to be lost through ammonia volatilisation.”

This unexpected loss of soil nutrients could seriously affect production on dairy farms, with many dairy farmers - feeling the squeeze from low international milk prices - cutting back on imported supplementary feed and relying on pasture production as a cost-effective alternative.

Advertisement - scroll to continue reading

Are you getting our free newsletter?

Subscribe to Scoop’s 'The Catch Up' our free weekly newsletter sent to your inbox every Monday with stories from across our network.

“By using products from within Ballance’s SustaiN range, which include the world leading Agrotain™ nitrogen stabiliser to minimise ammonia volatilisation, farmers can negate the effects of ammonia volatilisation and increase the amount of nitrogen available to grow more grass,” says Mr Stafford.

Mr Stafford cautions it’s also possible that farmers affected by higher than average rainfall, particularly those on free draining soils, will have experienced high sulphate leaching in their soils over winter. Soils with low soil sulphur levels have the potential to limit pasture responses to nitrogen fertiliser in the early-spring period, lowering overall growth. This can be overcome by switching from a nitrogen only product to a product which combines nitrogen and sulphur, such as SustaiN Ammo or PhaSedN QuickStart.

ENDS

© Scoop Media

Advertisement - scroll to continue reading
 
 
 
Business Headlines | Sci-Tech Headlines

 
 
 
 
 
 
 
 
 
 
 
 

Join Our Free Newsletter

Subscribe to Scoop’s 'The Catch Up' our free weekly newsletter sent to your inbox every Monday with stories from across our network.