Australia's vast swathes of farmland produce enormous quantities of food each year, delivering more than the nation can consume.
On average, its 85,000 farmers and farm businesses export about 70 per cent of their total annual output, including 78 per cent of their sugar, 71 per cent of wheat and 76 per cent of beef and veal.
Yet, during the onset of the Covid-19 outbreak, Australian stores experienced sudden shortages of staples such as flour, rice, mince meat and sugar. The unusual sight of these empty shelves around the country demonstrated that its supply chains have become increasingly vulnerable and is prompting a rethink about how to protect the nation's food security.
The worst of the shortages occurred in March, as the numbers of Covid-19 cases were rising and the nation prepared to go into lockdown. This prompted panic buying, which led to empty shelves even in the major supermarket chains. Limits were set on purchases of items such as eggs, pasta and sugar and to suspend online deliveries.
The shortages were a surprise for Australia, which is a global food bowl, with no lack of supply. It is the world's second-largest exporter of beef, fourth-largest of sugar and 10th-largest of cereals.
But its production process - from seed to table - is often dependent on the input of foreign suppliers.
For instance, it has a large dairy industry and exports 41 per cent of its total supply. Yet much of the packaging involves imported plastics and other materials. Farmers often depend on imported fertilisers and chemicals, as well as imported machinery and spare parts.
At the height of the pandemic, Chinese exports of glyphosate, a vital ingredient in the main weedkiller used in Australia, suddenly dried up, leaving farmers struggling to find supplies. The experience has prompted some farmers to try buying machinery and other items from local suppliers.
But most analysts believe Australia, with a population of 25 million, cannot sustainably supply all the chemicals, machines and packaging that would allow its agricultural and food processing sectors to be self-reliant.
An agriculture sector consultant and former federal policy adviser, Mr Andrew Henderson, suggested last week that Australia should instead join with regional partners such as New Zealand, Singapore and Pacific island nations to build up collective self-reliance.
"It's not smart for us to be self-reliant," he told ABC News.
Australia's food exports
• Farm production: A$60 billion (S$57.2 billion) annually
• Total exported: A$49 billion
• Major food exports: beef, meats, wheat, wine, fruit and nuts
• Major buyers: China (A$11.8 billion) Japan (A$5.1 billion) United States (A$3.9 billion) European Union (A$3.3 billion) South Korea (A$3.2 billion) Indonesia (A$2.6 billion)
"If we try to do that in agriculture, our economy will retract so much it will destroy the livelihoods of many, many Australian farming families. But what we can focus on is a regional approach, becoming regionally self-reliant."
He said Australia could support poorer countries that buy its food to develop their manufacturing processes. Indonesia, for example, is the largest buyer of Australian wheat and could develop spare machinery parts.
Another issue that emerged was that many of Australia's supermarkets are not designed for sudden bursts of buying.
Major chains Coles and Woolworths have in recent years cut the number of distribution centres, which are crucial for a large country where food can travel thousands of kilometres from farm to warehouse to supermarket shelf.
In late March, Coles opened up new distribution centres due to the sudden spike in demand.
According to a report in The Saturday Paper last month, supermarket warehouses and storage facilities hold only five days of fresh produce and about 30 days of stock of non-perishable goods.
Dr Geoffrey Annison, deputy chief executive of the Australian Food and Grocery Council, told the newspaper that the federal government could "nudge and encourage" grocery suppliers to increase their stockpiles.
Australia's Covid-19 outbreak peaked in late March and eased after strict lockdowns and travel bans. As of yesterday, Australia had 7,302 cases and 102 deaths. In the past week, it had 42 new cases, most of them Australians in quarantine after returning from overseas.
The reduction in cases has allowed social distancing restrictions to be wound back and has also eased the pressure on supplies. Supermarkets are now well-stocked and most customers appear to no longer be stacking their trolleys with excess supplies.