Norwegian engineers developed liquid nanoclay as one of several soil restoration methods designed to address global food security in water-scarce regions.
A remarkable experiment in the United Arab Emirates this spring showed how quickly barren desert can become productive farmland using innovative soil restoration methods. In just 40 days, workers converted empty sand into a thriving watermelon field using a clay-based treatment that addresses fundamental soil chemistry problems.
The achievement matters because the UAE imports nearly all its fresh produce, making food security a constant concern. The technology behind this transformation, known as liquid nanoclay, could help arid regions worldwide grow their own food instead of relying on imports.
The story of this innovation begins in Egypt’s Nile Delta during the 1980s. Farmers noticed their historically fertile land was losing productivity at an alarming rate. For thousands of years, the delta had sustained agriculture that allowed ancient Egyptian civilization to flourish. Something had changed dramatically in just a decade.
Scientists discovered the problem traced back to the Aswan Dam, built in the 1960s. Before the dam existed, annual Nile floods deposited clay particles, minerals, and nutrients across the delta plains. These clay particles gave the soil its ability to retain water and support plant life. The dam stopped these annual deposits, and within ten years, the soil had exhausted its fertility.
This discovery led researchers to understand the critical role clay plays in soil health. Ole Sivertsen, who leads Desert Control, the Norway-based company developing the nanoclay solution, explains that clay in proper amounts changes how soil holds moisture and supports plants. His company aims to transform unproductive desert land into farmable terrain.
Farmers have been adding clay to soil for thousands of years, but traditional methods have created problems. Working thick clay into the ground requires intense labour and disrupts underground ecosystems. Digging releases carbon stored in soil back into the atmosphere as carbon dioxide. The process also damages mycorrhizae, which are fungal networks that help plants absorb nutrients and hold soil together.
Norwegian engineer Kristian Olesen spent ten years developing a liquid clay formula that avoids these problems. The solution needed a precise balance because too little clay has no effect, while too much can create a waterproof crust or compact the soil. Testing in China, Egypt, the UAE, and Pakistan showed that every soil type requires a custom formulation.
The liquid nanoclay works by coating sand particles with a thin layer of clay. Sand grains carry a positive electrical charge while clay particles are negative, so they naturally bind together when they meet. This creates formations that trap water and nutrients in the root zone where plants need them most. Once applied, the treated sand can support crops within seven hours.
The International Centre for Biosaline Agriculture in Dubai independently verified that the technology works. Desert Control now plans to build mobile factories inside shipping containers that can produce the liquid nanoclay near where farmers need it. These units will use local clay and employ regional workers. The company has already completed trial projects across multiple continents and is working toward commercial scaling that could treat thousands of acres annually.
The first factory will produce enough liquid nanoclay to treat large areas quickly. Cities in the UAE plan to use it in parks because the treatment cuts water consumption by nearly half. This water savings becomes crucial in regions where fresh water is scarce.
Independent soil scientists have weighed in on the nanoclay approach. While they acknowledge its potential for sandy soils, experts note that soil restoration methods must match specific soil types and conditions. Sandy desert soils represent only one category of degraded land worldwide. Scientists also point out that long-term studies are needed to understand how nanoclay treatments interact with soil biology over multiple growing seasons.
Cost remains the biggest barrier to widespread adoption. Currently, treating one square meter of land costs around two dollars. This works for small farms in wealthy countries like the UAE, but farmers in sub-Saharan Africa cannot afford such upfront expenses. The treatment also requires renewal every five years.
Sivertsen believes scaling up production can reduce costs to around twenty cents per square meter. At that price, transforming desert land becomes cheaper than buying established farmland elsewhere, which typically costs between fifty cents and three dollars per square meter.
Desert Control is partnering with the United Nations Convention to Combat Desertification on the Great Green Wall Project. This initiative aims to create a barrier of trees and agricultural land to stop desert expansion across North Africa.
Comparing different soil restoration methods reveals distinct advantages for various situations. Hydroponics and vertical farming allow food production in deserts without soil treatment, but these systems require significant infrastructure and energy inputs. Greenhouse agriculture protects crops from harsh desert conditions but demands substantial water and cooling resources. Nanoclay treatment works directly with existing land and requires minimal ongoing infrastructure once applied.
The nanoclay technology only works for sandy soils, which limits its application. Other degraded soil types need different solutions. Biochar, a charcoal-like substance made by burning organic matter without oxygen, helps restore soils that have lost organic carbon. Vermiculite, an expanded mineral, and polymer beads also improve water retention but require disruptive soil cultivation. Each of these soil restoration methods addresses specific degradation problems, making them complementary rather than competing approaches.
The UAE watermelon experiment proved valuable when COVID-19 lockdowns began. The trial plot produced around 200 kilograms of watermelons, zucchini, and pearl millet. When strict lockdowns prevented food imports, Desert Control worked with relief organizations to distribute this fresh produce to local families who suddenly had limited access to fruits and vegetables.
Scientists want to test whether crops grown in nanoclay-treated soil have higher nutrition levels than conventional produce. Those studies await future trial plots. For now, the technology demonstrates how scientific understanding of soil chemistry can address food security challenges in the world’s driest regions.
Soil scientists emphasize that nanoclay represents one tool among many needed for global land restoration. The technology shows particular promise in regions where sandy soils dominate and water scarcity limits agricultural options. However, experts caution that no single approach can solve all soil degradation problems. Success requires matching specific soil restoration methods to local conditions, farmer resources, and long-term sustainability goals.
