The latest episode of the University of Szeged’s Science Podcast explores soil health, conservation-oriented cultivation practices, and ways to improve water retention in agricultural landscapes. Dr. Júlia Hupuczi, geographer, soil scientist, and associate professor at the University of Szeged’s Faculty of Agriculture, explains how effective water retention depends not only on irrigation, but also on the condition of the soil itself. Replenishing organic matter, growing cover crops, and adopting sustainable water management practices can together restore soil vitality and resilience.
Soil is not merely an abiotic medium, but a complex living system in which physical, chemical, and biological processes are closely interconnected. When one of these components is disrupted, the others are affected as well. “Soil is like a three-legged stool: if one leg is weakened, the entire system begins to wobble,” explains Dr. Júlia Hupuczi on SZTE’s Science Podcast.
For generations, farmers have believed that fields left bare after autumn plowing are resting. This long-held assumption is now being challenged because the bare surface is created through intensive tillage rather than natural recovery. In fact, frequent and deep soil disturbance can degrade soil structure and severely disrupt the soil’s biological life. Plowing overturns the soil layers and disturbs the natural distribution of the organisms within them. As a result, oxygen-dependent species are buried deeper, while organisms adapted to low-oxygen conditions are brought to the surface.
Dr. Hupuczi compares healthy soil to the inside of a freshly baked loaf of bread: crumbly, porous, and full of tiny air pockets. This sponge-like structure is created by plant roots working together with bacteria, fungi, and other soil organisms. Yet it is remarkably fragile. Repeated soil inversion, compaction, or field operations carried out when the soil is either too wet or too dry can quickly destroy it. When soil is dry, it breaks down into dust and hard clods; when it is overly wet, it becomes smeared and compressed, resulting in compaction.
As Dr. Hupuczi points out, the problem lies not with the machinery itself, but with when and how it is used. A single poorly timed tillage operation can impair soil structure for as long as three or four years. Modern agricultural machinery is also far heavier than it was in the past, while deep tillage places much greater stress on the soil. As a result, today’s plowing practices bear little resemblance to the shallow tillage traditionally carried out in earlier decades.
The podcast’s central message is clear: agriculture can no longer rely solely on traditional approaches. Farming practices must evolve in response to changing rainfall patterns, the increasing frequency of extreme weather events, and the continued degradation of soils. Restoring soil health, however, is a gradual process. As a living system, soil does not recover overnight, and in many areas, it has adapted to regular tillage. When farming practices change, its condition may therefore appear to worsen at first, discouraging farmers before the benefits become visible. This makes patience essential, as degraded soil may take 20 to 30 years to regenerate if left to recover naturally. With appropriate regenerative soil management, however, this process can be shortened to as little as three or four years.
Living plant roots are a cornerstone of soil-conserving farming practices. While agricultural machinery has its place, roots naturally loosen the soil, and cover crops feed soil organisms, protect the surface, and help rainfall infiltrate the ground. Their role is especially important during autumn and winter, when many agricultural fields are left bare. Yet, as the SZTE researcher points out, bare soil is not resting – it is suffering. As a living system, soil deprived of vegetation still needs nourishment and protection throughout the colder months. For this reason, replenishing organic matter remains one of the most pressing challenges in restoring the health of Hungary’s soils, she explains.
Restoring organic matter also means replacing what cultivation removes. During crop production, a substantial share of plant biomass is harvested and taken away from the field, disrupting the soil’s natural nutrient cycle unless that material is replenished. Although chemical fertilizers provide crops with essential nutrients, they cannot replace the organic matter required to sustain a thriving soil ecosystem. This function is fulfilled by materials such as animal manure, compost, mulch, crop residues, and the biomass produced by cover crops.
The podcast also addresses one of agriculture’s most pressing challenges: water retention. As Dr. Hupuczi explains, the challenge is not necessarily that overall rainfall has declined significantly, but that it has become increasingly irregular, arriving in shorter, more intense bursts. Healthy soil contains a network of pores and channels that allows water to infiltrate, move through, and remain stored in the ground. Degraded soil, by contrast, resembles a handful of compressed breadcrumbs, with little space for either water or air. Instead of soaking into the soil, rainwater often runs off the surface or evaporates rapidly. The upper 50 centimeters are particularly vulnerable to moisture loss, while water that drains quickly through cracks in compacted soil may pass beyond the reach of plant roots. Improving soil structure is therefore essential to mitigating the effects of drought. As Dr. Hupuczi emphasizes, effective water retention depends not only on irrigation, but also on the soil’s capacity to absorb and store water.
Beyond research, the University of Szeged’s Faculty of Agriculture helps farmers adopt water-retaining soil management practices through education and hands-on field demonstrations. One of its most effective teaching tools is the soil profile demonstration, which reveals the hidden world beneath the surface. As Dr. Hupuczi points out, a properly exposed soil profile tells the story of a field, revealing not only its current condition but also the legacy of past management practices. Farmers can see soil compaction, undecomposed crop residues, and the condition of deeper soil layers for themselves – often making these demonstrations more persuasive than any theoretical explanation.
Ultimately, the podcast reminds us that the future of agriculture begins beneath our feet. Soil is far more than a growing medium – it is a living ecosystem that must be protected and sustained. Together, conservation-oriented farming practices, replenishing organic matter, growing cover crops, and responsible water management can gradually restore its health and resilience. The results may not be immediate, but every step taken today helps build soils that retain more water, support more resilient crops, and strengthen agriculture’s ability to adapt to a changing climate.
The full podcast is available in Hungarian on SZTE’s YouTube channel
Original Hungarian article by Sándor Panek
Feature photo: Dr. Júlia Hupuczi, geographer, soil scientist, and associate professor at the University of Szeged’s Faculty of Agriculture, on the SZTE Science Podcast
