Soil formation and development are influenced by many factors, including parent material, climate, relief, and human economic activity. The foundation of soil formation is the continuous exchange of substances between the soil and the plants growing on it. Plants absorb essential mineral elements from the soil, and at the end of their life cycle, they return these elements to the soil as organic residues through roots, stems, leaves, and other biomass.
This organic matter is broken down by various organisms and transformed into water-soluble mineral salts and organic compounds. These substances then become available again for plants, supporting their growth and development. The interaction between soil and vegetation that drives this continuous nutrient exchange is called the biological nutrient cycle.
Moist peat soils act as excellent carbon reservoirs (natural storage), which is an important factor in combating climate change. Beyond preserving biodiversity, this is another reason why wetland areas should be protected.
Changes in soil structure are closely linked to climate change, whose primary cause is the increased concentration of carbon dioxide (CO₂) in the atmosphere. Healthy soil stores large amounts of carbon, thereby helping to reduce excess CO₂ in the air. Soils with high humus content can accumulate even more carbon, a process supported by modern sustainable cultivation approaches and methods that reduce the intensity of soil tillage in agriculture (REC Caucasus).
Climate plays a critical role in soil formation processes because it determines the supply of moisture and heat in the soil. These factors directly influence the type of vegetation and the activity of microbiological processes occurring in the soil. Additionally, climate affects the chemical and physical processes within the soil. In different climatic zones, soil formation occurs with varying intensity and patterns, resulting in the development of soil types characteristic of each region.
Soil degradation is often caused by erosion, which results from heavy rainfall and strong winds. Excessive or improper use of chemical fertilizers and pesticides reduces biological activity in the soil and harms beneficial microorganisms. Additionally, frequent and continuous tillage or the repeated cultivation of the same crop disrupts soil structure and gradually decreases its fertility (REC Caucasus).
There are specific approaches that are used to reduce soil degradation:
1. Minimal or No-Till (No-till / Low-till)
Minimal tillage involves disturbing the soil as little as possible, which helps preserve its natural structure and significantly reduces wind and water erosion. This approach is particularly effective for perennial crops, maize, legumes, and forage grasses. In Georgia, the gradual adoption of No-till or Low-till practices is
recommended because many soils in the country have heavy mechanical compositions (high clay and silt content), making machinery less effective under suboptimal seeding conditions. On such soils, especially under low moisture, sowing can be challenging, and the risk of seed damage increases. Proper planning, considering soil conditions, technical capabilities, and agronomic timing, is essential. When done correctly, combined with crop rotation, this method allows farmers to reduce production costs and improve long-term soil fertility.
2. Organic Matter and Compost
Organic matter is as essential to soil as food is to humans; it is the “nutrition” of the soil. Plant residues, manure, and other organic materials improve soil structure and enhance its vitality. Compost can be produced at home or on a farm using plant residues, vegetable waste, and manure. Regular addition of compost improves water retention, enriches soil with beneficial microorganisms, and reduces the need for chemical fertilizers.
3. Rotational Grazing or Crop Rotation
Rotational grazing involves moving livestock across pasture plots, preventing overgrazing and supporting the recovery of grass cover. This practice maintains balanced soil and promotes biodiversity. Farmers can divide pastures into zones, plan grazing schedules, and adjust livestock numbers according to the area, allowing soil to recover and enhance productivity. Crop rotation follows the same principle: alternating different crops on specific plots helps maintain soil health and fertility.
4. Mulching
Mulching involves covering the soil with plant material or other vegetative layers. It is one of the simplest and most effective methods to protect soil, reducing moisture evaporation, preventing wind and water erosion, and helping maintain soil structure.
5. Composting and Waste Integration
Integrating plant and agricultural residues on the farm allows waste to become a valuable resource. Incorporating vegetables, crops, and pasture grass residues into the soil or composting them naturally increases organic matter and improves soil fertility.
Soil and Vegetation Monitoring Today, soil and plant cover can be monitored using remote sensing, satellite data, drones, agrometeorological stations, and sensors. Soil protection from water erosion can be achieved by preventing overgrazing and maintaining continuous vegetative cover. In addition, windbreak strips are critical for protecting soil against wind erosion.
Regular Soil Testing Maintaining soil health requires regular testing. Knowing the soil’s pH and organic matter content allows farmers to plan fertilizer use accurately, avoid unnecessary expenses, and ensure crops receive optimal nutrients.
Blog authors: Nino Djibuti & Ilia Kunchulia
