April 3, 2025 | 10:39 GMT +7

  • Click to copy
Thursday- 10:12, 10/06/2021

A robot is killing weeds by zapping them with electricity

(VAN) On a field in England, three robots have been given a mission: to find and zap weeds with electricity before planting seeds in the cleared soil.
Tom (left) and Dick (right) are farming robots that work together to kill weeds without using chemicals

Tom (left) and Dick (right) are farming robots that work together to kill weeds without using chemicals

The robots — named Tom, Dick and Harry — were developed by Small Robot Company to rid land of unwanted weeds with minimal use of chemicals and heavy machinery.

The startup has been working on its autonomous weed killers since 2017, and this April launched Tom, its first commercial robot which is now operational on three UK farms. The other robots are still in the prototype stage, undergoing testing.

Small Robot says robot Tom can scan 20 hectares (49 acres) a day, collecting data which is then used by Dick, a "crop-care" robot, to zap weeds. Then it's robot Harry's turn to plant seeds in the weed-free soil.

Using the full system, once it is up and running, farmers could reduce costs by 40% and chemical usage by up to 95%, the company says.

According to the UN Food and Agriculture Organization six million metric tons of pesticides were traded globally in 2018, valued at $38 billion.

"Our system allows farmers to wean their depleted, damaged soils off a diet of chemicals," says Ben Scott-Robinson, Small Robot's co-founder and CEO.

Zapping weeds

Small Robot says it has raised over £7 million ($9.9 million). Scott-Robinson says the company hopes to launch its full system of robots by 2023, which will be offered as a service at a rate of around £400 ($568) per hectare. The monitoring robot is placed at a farm first and the weeding and planting robots delivered only when the data shows they're needed.

To develop the zapping technology, Small Robot partnered with another UK-based startup, RootWave.

"It creates a current that goes through the roots of the plant through the soil and then back up, which completely destroys the weed," says Scott-Robinson. "We can go to each individual plant that is threatening the crop plants and take it out."

"It's not as fast as it would be if you went out to spray the entire field," he says. "But you have to bear in mind we only have to go into the parts of the field where the weeds are." Plants that are neutral or beneficial to the crops are left untouched.

Small Robot calls this "per plant farming" — a type of precise agriculture where every plant is accounted for and monitored.

A business case

For Kit Franklin, an agricultural engineering lecturer from Harper Adams University, efficiency remains a hurdle.

The robot zapping weeds with electricity.

The robot zapping weeds with electricity.

"There is no doubt in my mind that the electrical system works," he tells CNN Business. "But you can cover hundreds of hectares a day with a large-scale sprayer ... If we want to go into this really precise weed killing system, we have to realize that there is an output reduction that is very hard to overcome."

But Franklin believes farmers will adopt the technology if they can see a business case.

"There's a realization that farming in an environmentally friendly way is also a way of farming in an efficient way," he says. "Using less inputs, where and when we need them, is going to save us money and it's going to be good for the environment and the perception of farmers."

As well as reducing the use of chemicals, Small Robot wants to improve soil quality and biodiversity.

"If you treat a living environment like an industrial process, then you are ignoring the complexity of it," Scott-Robinson says. "We have to change farming now, otherwise there won't be anything to farm."

Tr.D

(CNN)

Hon Cau Marine Protected Area: Home to sea turtle nesting site

Hon Cau Marine Protected Area: Home to sea turtle nesting site

(VAN) Hon Cau marine protected area is home to many rare marine species, including coral, fish, and seabed animals.

VIETNAM EXPO 2025 - Connecting trade promotion and green economic development

VIETNAM EXPO 2025 - Connecting trade promotion and green economic development

(VAN) VIETNAM EXPO 2025 allows Vietnamese and international businesses to join hands in cooperation, optimizing high-tech solutions across multiple sectors.

Announcing the commercial circulation of ASF vaccine Dacovac-ASF2

Announcing the commercial circulation of ASF vaccine Dacovac-ASF2

(VAN) Dacovac-ASF2 is the third African swine fever (ASF) vaccine product in Vietnam licensed for commercial circulation by the Ministry of Agriculture and Environment.

No vaccines provided to households vaccinating their own pets against rabies

No vaccines provided to households vaccinating their own pets against rabies

(VAN) Local authorities should not provide vaccines for households to avoid cases of unguaranteed quality and lack of high protective immunity.

Strategic solutions devised to achieve 4% growth in agriculture and environment sectors

Strategic solutions devised to achieve 4% growth in agriculture and environment sectors

(VAN) Positive market signals observed since early this year, combined with prompt adjustments in planning, are providing strong momentum for the agriculture and environment sectors to meet export target of 65 billion USD in 2025.

National product research for the marine economy

National product research for the marine economy

(VAN) Deputy Minister of Agriculture and Environment Phung Duc Tien emphasized this during a working session with the Vietnam environmental and marine sciences institute on April 2nd.

Kon Tum receives rare long-tailed monkey individuals

Kon Tum receives rare long-tailed monkey individuals

(VAN) A critically endangered long-tailed monkey has just been voluntarily handed over by local residents to the authorities for care and wildlife conservation.

Read more