Desert Control Field Trials Demonstrate Significant Yield and Water Efficiency Gains in Romaine Lettuce with Liquid Natural Clay

Sandnes, Norway, 20 July 2026 - Desert Control (OSE: DSRT), a leader in soil and water conservation technology, announces field trial results demonstrating that Liquid Natural Clay (LNC) can significantly improve romaine lettuce yields and water-use efficiency in sandy soils, offering growers a practical tool to address increasing water scarcity and soil management challenges.

An initial, spring 2026 trial was conducted on a historically underperforming sandy loam field in the Salinas Valley, where growers often face rapid water drainage, low organic matter, and limited nutrient retention. One acre treated with LNC was compared to one acre of untreated romaine lettuce under identical irrigation practices. Results were verified by the customer, a large grower in the Salinas Valley.

Results showed that the LNC-treated plot produced427 boxes per acre, compared with329 boxes per acrein the untreated control-a29.8% increase in yield. Average box weights remained nearly identical between the two plots, indicating that the increase was driven by a greater number of harvestable lettuce heads rather than increased plant size.

Assuming recent romaine lettuce spot pricing of $18/box, the increased number of boxes in the LNC-treated acre had the potential to increase sales by almost $1,800 per acre (98 additional boxes X $18).

The study also demonstrated a substantial improvement in water-use efficiency. The LNC-treated field achieved5.7 tons per acre-foot of water, compared with4.3 tons per acre-footin the control plot, representing a33% improvement in water -use efficiency.

By increasing the soil's reactive surface area, the product helps retain water and nutrients within the root zone, slowing water percolation through sandy soils and improving crop access to essential resources. This aspect of LNC was especially crucial during the first trial as crop performance was maintained during a delayed harvest period after irrigation had been stopped.

Subsequent to the first trial, the Desert Control and same grower conducted another romaine lettuce trial to confirm the results of the first trial. In nearby plots of over 5 acres, the LNC-treated lettuce harvest was 34% greater than the untreated plot. More detailed findings from the subsequent trial will be published soon. The whitepaper from the first trial is available at https://desertcontrol.com/results/

"These results demonstrate the practical value of improving the soil's ability to hold water and nutrients where crops need them most," saidJames Thomas, Chief Executive Officer. "In these trials, Liquid Natural Clay demonstrates yield increases of approximately 30% and higher, while meaningfully improving water -use efficiency, all without requiring additional water or changes to standard farming practices. We were pleased to see this degree of improvement in soil with 64% sand content; a type of soil which has not been the focus of our marketing efforts. We were also pleased to see this response in row crops, as our marketing focus has been permanent crops. Both findings indicate that our total addressable market could be larger than previously expected."

The findings suggest that LNC can serve as a practical management tool for growers seeking to improve productivity, conserve water, and build greater resilience against water stress and operational challenges, particularly in sandy soils.

For more information, please contact:

David Borah

Chief Financial Officer

david.borah@desertcontrol.com

About Desert Control

Desert Control develops innovative solutions to enhance soil health, conserve water, and promote ecosystem resilience. Our proprietary Liquid Natural Clay (LNC) allows sandy, fast-draining soils to retain water and nutrients, improving soil health, crop yields, and ecosystem vitality while conserving water. Desert Control provides customized solutions to strengthen sustainability, profitability, and prosperity for agriculture, forests, and green landscapes. In collaboration with partners and clients, we aim to preserve natural resources, enhance food security, and ensure a climate-resilient future.

Cautionary Note

This release contains forward-looking information and statements relating to the business, performance, and items that may be interpreted to impact the results of Desert Control and/or the industry and markets in which Desert Control operates. Forward-looking statements are statements that are not historical facts and may be identified by words such as "aims," "anticipates," "believes," "estimates," "expects," "foresees," "intends," "plans," "predicts," "projects," "targets," and similar expressions. Such forward-looking statements are based on current expectations, estimates, and projections, reflect current views concerning future events, and are subject to risks, uncertainties, and assumptions, and may be subject to change without notice. Forward-looking statements are not guarantees of any future performance, and risks, uncertainties, and other important factors could cause the actual business, performance, results, or the industry and markets in which Desert Control operates to differ materially from the statements expressed or implied in this release by such forward-looking statements. No representation is made that any of these forward-looking statements or forecasts will come to pass or that any forecasted performance, capacities, or results will be achieved, and you are cautioned not to place any undue reliance on any forward-looking statements.