Introduction about relevance
Intensive agriculture, excessive use of chemical fertilizers and pesticides, and now military operations, have left a significant part of Ukrainian lands degraded or toxic. Many areas have lost their natural structure, microbiota and ability to self-renew, which complicates traditional cultivation methods. Bioremediation gives farmers the opportunity not only to restore soil fertility, but to do so in an environmentally safe way that meets the requirements of the organic standard.
It is also becoming critically important due to the growing demand for organic products in the EU and Ukraine. The sooner a farmer starts restoration, the lower the cost of rehabilitation and the higher the future harvest.
What is bioremediation?
Bioremediation is a natural cleaning mechanism in which plants, bacteria, fungi and organic materials restore the structure and chemical balance of the soil. Unlike traditional reclamation, this approach works at the level of the microbiota, restoring the natural ecosystem of the soil. Importantly, bioremediation does not disturb the surface layer and does not require deep mechanical interventions.
The method allows the soil to gradually return to stable fertility without drastic changes to the agricultural landscape. In addition, it has a positive impact on biodiversity by returning beneficial organisms to the soil.
Forms of bioremediation
Phytoremediation
The use of hyperaccumulator plants capable of absorbing heavy metals, radionuclides, and agrochemical residues. Such crops not only purify the soil, but also structure the layer with roots, improving water permeability.
Some plants can accumulate toxins in their stems, while others can convert them into less dangerous forms, making phytoremediation a versatile tool even for heavily contaminated sites.
Microbiological degradation
Bacteria and soil fungi break down pesticides, petroleum products, explosives, and other complex organic compounds.
Microbial consortia can be tailored to a specific type of contamination, increasing the efficiency of cleanup. Some of them even work in soils with low organic matter content.
Biochar and composting
The combination of biochar, compost, and organic matter quickly improves soil structure and enhances the development of beneficial microflora.
Biochar can retain water in arid regions and reduce mineral leaching. Regular application creates a long-lasting carbon reserve that works for decades.
Advantages of bioremediation
• Does not destroy the natural soil layer, preserves its long-term potential.
• Restores microbial balance, which is the basis of fertility.
• Easily integrates into organic farming practices.
This is the lowest cost method in the long term. In addition, it forms a sustainable system that resists erosion and reduces the impact of climatic stresses.
Real cases
1. Cleaning from heavy metals and chemical contaminants
Hyperaccumulator plants—rapeseed, sunflower, mustard, lupine—have shown the ability to remove lead, cadmium, copper, and nitrates from complex soils. In 2024, Ukrainian research documented the successful cleanup of post-war contaminated sites, including explosive remnants of war zones.
After harvesting the biomass, toxins are removed along with the plant material, making the method environmentally friendly. Many farmers note that after just one season, the soil becomes more structured and retains moisture better.
(agrarian-innovations.izpr.ks.ua)
2. Microbiological and bacterial degradation
Bacteria such as Pseudomonas, Rhodococcus, and Bacillus are capable of destroying pesticide and petroleum residues, which are often found on post-agricultural lands. After microbial treatment, the soil can be safely converted to organic status.
Microbials work faster in soils rich in organic matter, so they are often combined with compost or biochar, a method that is gaining popularity among farmers who want to increase humus levels and reduce field toxicity.
(arxiv.org)
3. Biochar and regenerative agriculture
Biochar restores soil structure, provides a stable carbon stock, reduces acidity, and improves water retention. The effect lasts for decades, making it considered one of the most effective tools for long-term restoration.
Farmers using biochar report an increase in earthworm numbers and restoration of microbiota in just one season. It also reduces fertilizer needs by 30–40%.
(kurkul.com)
Practical checklist for Ukrainian farmers (2025)
- Soil analysis: chemical composition, microbial profile, organic matter, structure.
- Choice of restoration method: phytoremediation, microbiology, biochar, combined schemes.
- Planning: division of the plot into sectors, crop rotation, phased clearing.
- Organic fertilizers: compost, vermicompost, mulch, green manure.
- Crops for restoration: lupine, rapeseed, oilseed radish, phacelia, clover.
- Monitoring: soil analysis every 6-12 months, work log.
- Transition to organic: rejection of chemical pesticides, replacing them with biological products.
- Curation: consultations with ecologists, agronomists, study of bioremediation methods.
- Tips: start with 10–20% of the area, test mixed methods, and observe.
- Long-term perspective: increasing humus, restoring biodiversity, stabilizing yields.
A farmer who starts recovery in 2025 could reach organic standards in just 2–4 years, depending on contamination. This opens up access to new markets and offsets costs through the premium price of organic produce.
Bioremediation is not just a technology, but also a strategy for the future, allowing for the transition from depleting agriculture to regenerative agriculture. In the conditions of Ukraine in 2025, it becomes an economically viable tool for farmers seeking to increase fertility and protect the land from further degradation. The use of natural cleaning methods provides a balance between profitability and environmental safety.
Restored lands are more resistant to drought and erosion and produce stable yields even in challenging climates. Bioremediation is an investment not only in next year’s harvest, but also in the sustainability of the farm for decades to come.
Useful sources
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