Aerated slurry can pay
GRASS uses organic nitrogen more readily from slurry which has been aerated. That is the finding of a Farm Electric Centre trial carried out with Harper Adams College.
It also showed that aeration has no detrimental effect on the overall fertiliser value of the farm waste.
Aeration can be used to reduce the effects of pollution and reduces odour emitted during and after spreading by up to 90%.
"Our research shows the benefits of aeration extend beyond pollution control," says FEC livestock specialist, Steve Bettany.
He believes aeration may also alter the nitrogen make-up of slurry by possibly reducing ammonification.
"This means that nitrogen in aerated slurry could remain in the soil for longer, because it is provided in a more stable form," he says. "Crops then have a greater chance to use the nutrient."
More details from the FEC at Muck 95, NAC Stoneleigh, on April 5 and 6.