Beyond Rain: The Hidden Key to UK's Water Extremes
A significant portion of the UK's cultivated land is losing its natural vitality, with many arable soils struggling from a severe lack of organic carbon. This degradation cripples the soil's ability to absorb water, leading to a dangerous cycle of increasingly dramatic droughts and floods across the country. As weather patterns become more erratic due to climate change, the weakened soil acts less like a sponge, exacerbating the impacts. Fortunately, new research shows that by focusing on the hidden microbial life in our soils, we can begin to reverse this damage and build more resilient landscapes.
The health of our soil is in decline, with 40 to 60 percent of the UK's arable soils having lost vital organic carbon. Research also highlights that nearly 40 percent of these soils are considered 'degraded'. This has serious consequences for everyone, especially for farmers, as the land struggles to handle water. Just like a healthy gut relies on its microbiome to maintain a protective barrier, healthy soil needs its microbial networks to absorb and retain water. Without this, our fields are more vulnerable to both droughts and floods.
Our climate is bringing increasingly erratic weather, and degraded soils are struggling to cope. When soil loses its organic matter, it loses its sponge-like ability. For example, just one percent of soil organic matter can hold an extra 16,500 gallons of water per acre. This means when heavy rains hit, water runs off instead of sinking in, often carrying pollutants like pesticides into rivers. Conversely, during dry spells, the soil dries out faster, worsening drought conditions.
compacted soil also prevents water from passing through and harms the crucial microbial life and root growth. An estimated four million hectares of soil in England and Wales are at risk of compaction, potentially costing agriculture around £163 million each year in lost productivity. The good news is that this damage isn't permanent. Recent trials in Hampshire showed remarkable improvements, with a combination of microbial soil treatment and mechanical aeration leading to 26 percent more grass and an impressive 86 percent better water absorption.
More research is essential to tackle these complex challenges. New government-backed trials are underway, including a Department for Environment, Food and Rural Affairs (Defra) initiative this autumn, to explore how microbial approaches can help farmers reduce costs, build resilience against drought, and protect water quality. While farmers face many uncontrollable factors, they can improve their land's resilience by nurturing the microbial life beneath their feet. Just as we've learned the importance of our gut biome, it's time to recognize the vital role of our soil biome for a healthy environment.