Updated: An Incitec Pivot Fertilisers spokesperson said supply has been sourced from a number of sources to ensure farmers will be able to access their fertiliser needs.
"Supply and ships have been arriving regularly, thanks to extensive and diverse supply chains," the spokesperson said.
"Supply chains, manufacturing plants and product distribution centres continue to operate to benefit the agricultural industry.
"IPF teams at fertiliser distribution centres have been working hard to supply fertiliser in a safe and orderly manner.
"We are encouraging farmers to work with their dealers to plan fertiliser requirements and schedule loads so they can be picked up in time for their planting."
Earlier: Wimmera farmers are concerned possible fertiliser shortages could have a long term effect on yields across the region.
Murra Warra farmer and Victorian Farmers Federation president David Jochinke said he has been fielding dozens of calls every day from concerned farmers waiting on shipments.
"There's a huge push at the moment to get starter fertiliser, which is causing delays up the supply chain," he said.
"I'm spending three-to-four hours a day trying to stay ahead of the news and how it will impact farmers.
"The rest of my time I'm talking with concerned farmers."
Mr Jochinke hypothesised the delays were caused by reduced shipments due to the COVID-19 pandemic and farmers stockpiling across the state.
"There's a real uncertainty among the farmers right now," he said.
"The unfortunate thing is some farmer's programs won't have their full fertiliser requirements.
"I have heard some farmers are concerned they won't see any fertiliser at all.
"There's a saying in farming - once you're behind you're behind - and that will ring true in the future."
Mr Jochinke said two important stages in broadacre production required fertiliser.
"The first thing is get your crop in and establish, which requires MAP (monoammonium phosphate) and nitrogen," he said.
"The second stage is more nitrogen and whatever trace elements you need for your crop.
"Anyone who can't get their fulfilment will see a yield penalty and there are only a few things you can do to catch up.
"This will have real financial implications down the line."
One primary producer unsure on whether he would be able to fulfil his fertiliser commitments for the upcoming season is Lubeck farmer and VFF Wimmera branch president Graeme Maher.
"Fertiliser has been hard to come by - glyphosate is almost unobtainable," he said.
"Everyone is trying to lock down their fertiliser commitments now before it's too late.
"Last week, I spent two days trying to secure a slot at Geelong and even as I sent the truck down I was unsure it would come back full.
"Most of it would be sitting on wharves in China; I'm told it is coming and I guess I have to take their word for it.
Key national distributor Incitec Pivot Fertilisers (IPF) said it has been working hard to deliver essential products and services to farmers during the coronavirus outbreak.
IPF President Stephan Titze said as restrictive measures to prevent the spread of the virus were implemented, IPF has been working closely with customers, farmers and Federal and state governments to keep supply chains functioning.
"Fertiliser is, and will remain, a critical input to food production and we are committed to keeping the supply chains open during this time," he said.
"We will continue to work closely with Governments and other stakeholders to enable supply continuity of our essential fertilisers.
"Autumn is a key seasonal period for fertiliser application for farmers and the recent rain has been welcome and timely."
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