It is spring in Iowa, and a sensor the size of a lunchbox is being dragged six inches under the topsoil at the pace of a brisk jog. Every fraction of a second it fires - a pulse of light hot enough to turn a speck of dirt into glowing plasma. The plasma flickers. The sensor reads the color of that flicker like a fortune teller reads a palm, and out comes a number: parts per million of nitrogen, phosphorus, potassium, the pH, the works. No lab. No two-week wait. No guessing.
That lunchbox belongs to TerraBlaster, a young company that has decided the most boring problem in farming - what, exactly, is in the soil - is also the most expensive one. Farmers spend more on fertilizer than on anything else. Globally the bill runs to roughly a quarter-trillion dollars a year, and by most estimates about $100 billion of it is simply wasted, spread where it isn't needed because nobody could afford to measure closely enough. TerraBlaster's answer is not to spread less fertilizer or more. It is to finally know.
Getting fertilizer nutrient levels instantaneously and making fertilizer decisions in real time - that's the Holy Grail.Jorge Heraud, Co-founder & CEO
Jorge Heraud is not a first-timer chasing a trend. He spent over a decade in precision agriculture at Trimble, then co-founded Blue River Technology, whose "See & Spray" system taught machines to recognize a weed and hit only the weed. John Deere bought Blue River in 2017 - a deal valued around $305 million - and Heraud stayed on seven years as a VP of automation and autonomy, watching his invention roll into fields worldwide.
He left Deere in 2024 to advise agtech startups, and one of them refused to leave him alone. In May 2025 he took the CEO seat at TerraBlaster full-time. His framing is tidy: if the last decade was "See & Spray," the next one is "Measure & Apply" - reading the ground in real time and dosing it accordingly, in the same pass.
He is blunt about why. He likes bets that are "huge in both financial and environmental impact," and he calls soil intelligence "the number one opportunity in agtech right now." Coming from someone who has already banked one exit doing exactly this, it lands less like a pitch and more like a scouting report.
Ex-Blue River (sold to John Deere, ~$305M) and former Deere VP of automation. Trimble precision-ag veteran.
Leads the sensor engineering turning space-grade spectroscopy into rugged field hardware.
Founder of Impossible Sensing, the St. Louis deep-tech firm whose Mars-rover LIBS technology TerraBlaster licenses.
The technology is called Laser-Induced Breakdown Spectroscopy - LIBS - and it was built for reading Martian rock, not Midwestern loam. TerraBlaster's twist was making it survive a tractor.
A rugged probe cuts a small trench and looks a few inches into the soil - then closes it "like it never happened."
A pulsed laser heats a spot smaller than a square millimeter, vaporizing it into glowing plasma.
Each element emits a signature color. The sensor reads the spectrum - a chemical fingerprint - in milliseconds.
AI turns readings into a live nutrient map at up to 1/10-acre resolution, feeding variable-rate spreaders.
“We measure nutrients in parts per million, like a lab does.” The difference is that the lab needs a courier and two weeks. TerraBlaster needs a tractor doing about five miles per hour - with a stated ambition to push toward ten, even twenty.
Traditional soil sampling pulls a plug of dirt every 2.5 acres or so, mails it off, and averages the field into a blur. Fertilizer then gets spread by that blur - too much here, too little there. The over-application isn't just money burned. It runs off into waterways, feeds algae, and creates the oxygen-starved dead zones that make headlines every summer.
TerraBlaster's claim is resolution. Mount one sensor per planter row and you can resolve down to roughly a tenth of an acre - the company frames it as a 25-fold jump. When you can see the field in that kind of detail, "the right amount of fertilizer" stops being a slogan and starts being a coordinate.
Figures are industry estimates cited in TerraBlaster press coverage; treat as approximate.
Soil testing is regularly ranked farmers' least favorite task. TerraBlaster folds it into a pass the tractor was making anyway.
High-resolution NPK and pH maps feed existing variable-rate machinery - the right nutrients, only where they're short.
Less over-application means less runoff, fewer algae blooms, and smaller downstream dead zones.
Heraud's short version: it "saves time, saves money, increases yields, and reduces waste."
Jorge Heraud joins full-time as CEO, moving from advisor to operator.
Led by Khosla Ventures - an early Blue River backer - with Bidra (OCP Group's venture arm), The Reservoir, and Trailhead Capital.
Prototype sensors head to Iowa for their first real dirt.
Newer hardware in the field; a $10-15M seed round underway ahead of a targeted late-2026 launch.
One strategic detail worth a raised eyebrow: Bidra is the venture arm of fertilizer giant OCP Group. A company that sells fertilizer is helping fund a company that helps farmers buy less of it - which is either a hedge or a very long game.
Video links open a search for the most current clips - direct demo uploads may vary over time.
Return to that lunchbox in the dirt. A year ago the same field would have been sampled the old way: a handful of plugs, a mailer, a two-week silence, and a map so coarse it treated acres of variety as one flat average. The fertilizer that followed was a confident guess - and confident guesses are how a hundred billion dollars ends up in the wrong place and the wrong water.
Now the guessing thins out with every pass. The trench opens, the laser fires, the plasma glows, the numbers land - nitrogen here, potassium there, a low pH in the corner nobody suspected. The trench closes like it never happened. What changed isn't the tractor or the season or even the fertilizer. What changed is that the field can finally be read. TerraBlaster's bet is that once a farmer can see the ground that clearly, going back to guessing will feel about as sensible as farming blindfolded.