Serious disruptions to overseas supply chains because of the coronavirus pandemic has started a serious national rethink about the disappearance of much of Australia's manufacturing sector.

Tariff cuts and trade liberalisation policies in the 1980s and 1990s left local manufacturers vulnerable to cheap overseas products and many of our secondary industry jobs have now migrated overseas.

The federal government announced a $1.3 billion program in February to boost local manufacturing with a focus on industries like food and beverage, resources technology and minerals processing and medical products.

And federal Opposition leader Anthony Albanese has unveiled a $15 billion national reconstruction fund to boost local manufacturing.

If elected he has promised a new Labor government would partner with the private sector, including superannuation funds, to commercialise local innovation in areas such as medical equipment, pharmaceuticals, food processing and transport.

He said the fund would help drive regional growth and diversify the economy.

One secondary industry Australia has excelled is farm machinery and while the sector has shrunk since the 1960s and 1970s, the same spirit of innovation and determination that drove the likes of Headlie Taylor, Albert Fuss and Bob Chamberlain still exists among today's manufacturers.

In recent weeks Bundaberg-based Canetec announced it had built the world's first sugarcane harvester powered by a Stage 5 diesel engine and planned to develop a market for the machines in Japan.

Canetec's chief executive Glen Soper said confidence in the local manufacturing sector was rising.

"I get steady levels of contact from around the world on (cane) harvesters but recently the prospects have been a little more engaging," he said.

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Two Australian farm machinery companies Goldacres and SwarmFarm and their overseas partners have joined forces to produce what they claim is the world's first fully autonomous green-on-green weed spraying unit.

They fitted a Goldacres trailing sprayer with green-on-green weed detection technology and hooked the machine to a SwarmBot robotic tractor built by Queensland-based SwarmFarm.

These companies are following in the footsteps of Headlie Taylor who invented the header harvester in 1914 and the auto header in 1924 and Albert Fuss who invented the air seeder in 1956.

Gyral, the Toowoomba-based company which grew out of Albert Fuss's invention, is still managed by members of his family.

Australian-built tractors and machinery from the likes of Chamberlain, Horwood Bagshaw and John Shearer were major players in the farming scene back in the 1960s and 1970s.

The Chamberlains built by Bob Chamberlain at his factory at Welshpool in WA from 1949 were probably the most well-known locally made tractor after the Second Word War but there were others including Baldwin and Upton.

Today the global brands of giant farm machinery manufacturers based in Europe and the US dominate the Australian cropping belt.

But the tide is turning a little. The Commonwealth Bank has given a big thumbs up to Australia's growing agritech industry.

The big bank has become a foundation member of the Australian Agritech Association (AusAgritech).

AusAgritech chairman Andrew Coppin said the CBA was a major lender to agribusiness and it made sense for the bank to back the growth of the emerging local agritech sector which could lift productivity and profitability across the whole of agriculture.

"The Australian agritech industry is a fast growing sector of the economy that is creating skilled jobs, regional hubs of expertise and significant domestic benefits to farming businesses and others in the agri-food supply chain," he said.

"With a growing cohort of successful start-ups and scale-ups across the country driving more innovative outcomes, the sector is now starting to attract material investment and interest across federal and state governments.

CBA Agribusiness general manager Tim Harvey said growing momentum of agritech was creating unique opportunities for the food and fibre sector across the country.