THE REVOLUTIONARY agricultural robot, Agbot II, could save Australia’s farm sector $1.3 billion a year by reducing the costs of weeding crops by around 90 per cent.

Agbot II could reduce the costs of weeding crops by around 90 per cent.

Demonstrated for the first time at Bundaberg in Queensland this week, the robot was designed and built by the Queensland University of Technology (QUT) with support from the Queensland Government.

QUT’s agricultural robotics program leader, Professor Tristan Perez, said Agbot II’s sensors, software and other electronics enabled it to navigate through a field, detect and classify weeds and then kill them either mechanically or chemically. The robot can also be used to apply fertiliser.

“In future versions, the robots could also feed back data on such things as soil and crop health and the state of diseases as they conduct their operations. This would enable better management decisions driven by paddock specific real-time information,” he said.

Professor Perez said Agbot II had demonstrated an outstanding performance in the use of robotic vision and artificial intelligence for the detection and classification of different weed species.

“The cutting edge robotic vision gives Agbot II the ability to spot-spray selected weed species and use mechanical tools to remove other weeds species that are herbicide resistant,” Professor Perez said.

“To date, we have concentrated on the three weeds that are relevant to Queensland: volunteer cotton, sow thistle and wild oats, and the vision system operated with 99 per cent accuracy in the classification of the correct species based on the images collected by the robot cameras.”

Detect and classify weeds

He said one of the key problems is that weeds are becoming increasingly immune to chemical control and that was why it was important an agricultural robot could not only detect, but classify the weed species on the spot and decide which actions to take to treat them.

“Agbott ll’s vision system can identify weeds and decide in real time which are better to spray and which are better dealt with, for example, mechanical or thermal methods,” he said.

“The light weight of AgBot II, which is about 600 kilograms, will help reduce soil compaction that affects the yield by limiting the root development of the crops. Also, due to weight, the robots can be deployed faster onto fields after rain to keep a tight control of weeds before they drop their seeds.

“In addition AgBots are designed to work in groups and this increases the reliability of weeding operations. If one robot has a problem and fails, the others continue operating. This is not the case with a single tractor or single sprayer operation.”

Professor Perez said Agbot ll was solar powered at present, which was better for the environment and the farmer’s budget.

Forefront of innovation

He said QUT’s Farm Robotics team was at the forefront of innovation in agricultural robotics.

“We are integrating deep agricultural knowledge and systems science with powerful digital technologies such as big data analytics, economic modelling and decision science into these farm robots,” he said.

The QUT team is currently in discussion with potential commercialisations partners to take this technology to Australian farmers soon.

QUT’s program on Strategic Investment in Farm Robotics (SIFR) is co-funded by the Queensland Government, through the Department of Agriculture and Fisheries.

The three-year program, conducted at QUT under the ARC Centre of Excellence for Robotic Vision with the support of QUT’s Institute for Future Environments, aims to develop and fast-track farm robotic technology that will reinvigorate agricultural productivity by increasing production and reducing costs.

The SIFR program takes an integrated approach and focuses not only on technology, but also on key enabling factors for its adoption, including economics and business; risk, regulation and policy; and social aspects such as workforce education and training.

Source: QUT