Soil degradation is taking a measurable toll on the world’s food supply, with new research suggesting that restoring degraded farmland could dramatically increase agricultural output.
Researchers from the University of Bonn, the University of Minnesota, the University of Basel and Hamburg University of Technology have produced the first global estimate of how soil degradation affects agricultural yields, finding that a 10% rise in degradation reduces crop production by around 2%.
Published in Nature Food, the study concludes that reversing just 10% of human-induced degradation worldwide could boost yields sufficiently to feed an additional 70 million people.
“Overall, the findings show how important soil quality is to the supply of agricultural produce,” said Professor David Wuepper, head of the Land Economics Group at the University of Bonn.
Measuring the hidden cost of degraded soils
The research addresses a long-standing debate over the extent to which degradation affects farm productivity.
To quantify the impact, scientists divided the world’s agricultural land into 10km by 10km parcels and compared yields between areas with similar climatic conditions. After accounting for variables such as fertiliser use and irrigation, they identified high-performing regions with little evidence of soil damage as benchmarks for potential productivity.
The team then analysed five major indicators of degradation: erosion, dehydration, soil compaction caused by heavy machinery, soil carbon losses and low vegetation cover.
Using AI-powered analytical methods, researchers linked degradation levels with yield gaps across global cropland.
“Our findings provide an approximate rule of thumb,” said lead author Dr Hadi Hadi, a postdoctoral researcher at the University of Bonn. “A 10% increase in the degradation rate cuts the yield by an average of 2%.”
The findings come against a backdrop of intensifying environmental pressures. Farming practices such as monocultures, overfertilisation and slash-and-burn agriculture continue to degrade soils, while climate change is accelerating erosion through more frequent storms and intense rainfall events.
Reasons for optimism
Despite the scale of the challenge, the researchers believe there are clear pathways to improvement.
Asked what gives him hope following the study, Wuepper pointed to growing evidence that policy interventions can successfully reduce degradation.
“Yes, we are quite hopeful on the solution side,” he told AgNavigator. “The challenge is grand, but we find a lot of encouraging evidence.”
A separate Nature Food study recently found that agri-environmental policies have played a significant role in reducing cropland degradation globally. Programmes supporting sustainable land management, conservation measures and environmental stewardship were shown to help limit erosion, nutrient depletion and other forms of soil damage while maintaining agricultural production.
The researchers concluded that evidence-based agri-environmental schemes can deliver measurable environmental benefits and should remain central to future agricultural sustainability strategies.
Beyond technology alone
Wuepper also highlighted research suggesting that solving soil degradation will require broader changes to farming systems rather than relying solely on individual technologies.
Another recent study in Agricultural Systems argues that many past innovations improved productivity but also contributed to unintended consequences including soil degradation and biodiversity loss. The authors advocate a “vision-led” approach that combines technologies such as AI, robotics, sensing, breeding and environmental monitoring with supportive policies, institutional reforms and new business models.
The goal, they argue, is to redesign farming systems that can improve environmental outcomes while remaining economically viable for farmers.
Satellite monitoring could strengthen policy delivery
Emerging monitoring technologies may also help governments implement more effective soil protection measures.
According to a 2026 perspective published in Environmental Research Letters, advances in satellite observation are enabling more targeted and outcome-based agri-environmental policies. High-resolution Earth observation data could allow continuous monitoring of farming practices and environmental outcomes, reducing reliance on inspections and self-reporting.
Researchers argue that satellite-enabled systems could support results-based payments, improve carbon and biodiversity accounting, and ensure public funds are directed towards farms delivering the greatest environmental benefits.
For Wuepper, these developments reinforce a key message from the new study: declining soil quality is not an unavoidable consequence of modern agriculture.
