TerraBlaster Raises $12.5 Million for a Laser Soil Scanner That Maps Nutrients at Tractor Speed
28 September 2026, St. Louis: A St. Louis, Missouri agtech startup has closed an oversubscribed $12.5 million seed round to commercialize a soil scanning system that reads nutrient levels in real time as it is towed behind a tractor or ATV. TerraBlaster announced the round on August 25, 2026, bringing its total funding to $16.5 million since the company’s founding. The round was led by Ulu Ventures, with Khosla Ventures, Trailhead Capital, Builders Vision, Bidra, Ag Startup Engine, Reservoir, Sunna, Plug and Play, GrainInnovate and the Hort Innovation Venture Fund also taking part.
The company’s core technology is laser induced breakdown spectroscopy, known as LIBS. A high energy laser pulse strikes the soil and instantly vaporizes a tiny sample into a glowing, superheated gas called plasma. As the plasma cools, it emits light at wavelengths that are unique to each chemical element present, and TerraBlaster’s sensors read that light to calculate concentrations of nitrogen, phosphorus, potassium and other nutrients on the spot. LIBS itself is not new. It has been used for years in planetary rovers, scrap metal sorting and industrial quality control. What TerraBlaster has built is a version rugged and fast enough to work continuously in a moving field implement, rather than on a single stationary sample in a lab.
From Mars Rovers to Midwest Fields
TerraBlaster’s origin traces directly to space exploration. Board member Dr. Pablo Sobron spent years developing LIBS instruments for NASA, the Canadian Space Agency and the SETI Institute before he and colleagues at St. Louis based Impossible Sensing set out to adapt the underlying laser and optics technology for farming. They recruited Jorge Heraud, who previously co-founded Blue River Technology, a machine vision company that John Deere acquired in 2017 in a deal reported at around $305 million, to serve as chief executive. Matt Colgan, who spent 18 years building sensors and algorithms at Blue River including work on its See and Spray weed detection system, joined as chief technology officer.
The company’s product, called the Blaster 1,000, tows behind a tractor or all terrain vehicle at roughly 5 miles per hour. It reads soil at a depth of about six inches and fires laser pulses approximately 20 times a second, building a continuous nutrient map instead of a handful of scattered data points. That sampling density allows TerraBlaster to generate maps at a resolution of about 0.15 acres, a much finer grain than the grid sampling many farmers and retailers currently use, in which a soil probe typically pulls a physical core once every two to three acres before sending it to an outside laboratory for results that can take one to two weeks to come back.
What It Means for Growers and Retailers
According to chief executive Heraud, replacing conventional lab based grid sampling with in field, real time LIBS readings could save growers roughly $10 an acre in soil testing and sampling costs. More significantly, the company projects that more precise, zone specific fertilizer application, guided by a denser and faster nutrient map, could lift returns by around $35 an acre in corn and soybean fields, with the biggest gains, reaching as high as 20%, concentrated in a field’s most nutrient deficient patches, where blanket fertilizer rates currently either underfeed or overfeed the crop. TerraBlaster is targeting a full commercial launch later in 2026, initially working with row crop growers, input retailers and independent agronomists across the US Corn Belt, the funding round’s backers said.
The approach fits into a broader shift in input retailing toward variable rate fertilizer recommendations, where a single average soil test for a field is replaced by dozens of zone specific recommendations. Retailers offering variable rate services have historically been limited by how densely they can afford to sample a field, since lab analysis is billed per sample and takes time to turn around. A tool that captures thousands of readings in a single pass could let that service be offered more often and at lower cost, though TerraBlaster has not yet published independent, third party validation of its sensor’s accuracy against standard wet chemistry lab methods across a range of soil types.
Also Read: New US Tariffs on Chinese Drones Raise Costs for Spray-Drone Farmers
Global Agriculture is an independent international media platform covering agri-business, policy, technology, and sustainability. For editorial collaborations, thought leadership, and strategic communications, write to pr@global-agriculture.com
