Gardaí have urged both farmers and the public to be safe during the slurry spreading season.
Farmers in all parts of the country can now spread slurry as the closed period has come to an end.
The opening date for spreading slurry depends on the county that the farm is located in, with the country divided into three zones.
Farmers in Zone A were permitted to spread organic fertiliser (both slurry and farm yard manure) from Tuesday, January 13 of this year.
Farmers in Zone B were allowed to spread organic fertilisers from Friday, January 16.
Farms located in Zone C were be permitted to spread organic fertiliser from yesterday (Sunday, February 1).
As slurry spreading season commences, gardaí said it is likely there will be an increase in the volume of agricultural vehicles using the roads.
"If you are travelling behind a tractor or other slow moving vehicle, be patient and don’t be tempted to overtake in a dangerous manner.
"Always be on the look out for farm machinery exiting fields and farm yards," a social media post from An Garda Síochána Donegal read.
Gardaí said that farmers "need to be safety conscious too" and when the traffic is building up behind them, keep left when safe to do so in order to allow others to pass safely.
They added that you should never use or hold your mobile phone while driving farm machinery on public roads.
Gardaí also reminded drivers of agricultural vehicles of the following during slurry spreading: