Soil represents a living foundation for organic and agroecological agriculture and is central to long-term soil health. It is more than just a growing medium for crops. Soil supports biodiversity, water regulation, and nutrient cycling, and it plays a central role in sustaining food systems. Healthy, functional soil allows plants to grow with minimal external inputs while maintaining ecological balance—an essential factor in strengthening soil and nutrition Kerala initiatives.
Today, soil health is under serious threat due to widespread soil degradation and unsustainable agricultural practices. These practices disrupt natural soil systems and lead to nutrient imbalances and deficiencies. From an agroecological perspective, soil health depends on soil functioning as a self-regulating living system. Functional soil is characterized by high organic matter content, rich biodiversity, and a stable structure that supports plant growth, water movement, resistance to erosion, and resilience to climate variability. In organic agriculture, soil quality cannot be separated from biodiversity or sustainable plant growth.
Nutrients in the soil are essential for plants to complete their life cycles and are closely linked to soil health outcomes. These nutrients originate from soil minerals, organic matter, and biological processes such as decomposition and nitrogen fixation. Nutrients are broadly classified into macronutrients and micronutrients. Macronutrients include nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur, while micronutrients include iron, zinc, boron, manganese, copper, and molybdenum. In organic farming systems, nutrient availability depends largely on biological activity. Soil microorganisms play a critical role in transforming nutrients into plant-available forms, strengthening soil and nutrition systems in Kerala’s agroecological landscapes.
Nutrient deficiencies occur when soil biological functions are impaired or when organic matter levels decline. Common signs include yellowing of leaves, stunted growth, poor flowering, and increased vulnerability to pests and diseases. Agroecology views these symptoms not as isolated nutrient shortages, but as indicators of imbalance within the soil ecosystem. For example, nitrogen deficiency may reflect low organic matter, while micronutrient deficiencies may result from soil degradation, erosion, or unsuitable soil pH—challenges commonly observed in degraded soils across Kerala.
At the root of nutrient deficiencies are land management practices — and these are among the most critical factors affecting soil health in Kerala. Monocropping, excessive tillage, erosion, and heavy use of chemical fertilizers degrade soil organic matter and disrupt soil organisms. High rainfall and poor irrigation practices can further increase nutrient losses, particularly in tropical regions like Kerala. Climate change intensifies these challenges by increasing rainfall variability and temperature extremes. From an agroecological perspective, nutrient deficiency is a symptom of deeper soil imbalance rather than a problem that can be solved through quick chemical interventions.
Organic farming and agroecology offer effective pathways for restoring soil health and nutrient balance by directly addressing the factors affecting soil health at their ecological root. Practices such as composting, green manuring, cover cropping, crop rotation, mulching, and the use of biofertilizers enhance soil organic matter and microbial diversity.
Reduced tillage and erosion control measures help protect soil structure and conserve nutrients. These approaches support efficient nutrient recycling, reduce dependence on external inputs, and improve climate resilience.
Healthy soil is fundamental to sustainable and regenerative agriculture. Nutrient deficiencies signal underlying ecological disruptions that require holistic and nature-based solutions. By prioritising living soils, biodiversity, and natural nutrient cycles, agroecological systems support food security, environmental conservation, and long-term soil and nutrition Kerala goals.
References
Altieri, M. A., Nicholls, C. I., Henao, A., & Lana, M. A. (2015). Agroecology and the design of climate change–resilient farming systems. Agronomy for Sustainable Development, 35(3), 869–890. https://doi.org/10.1007/s13593-015-0285-2
Brady, N. C., & Weil, R. R. (2016). The nature and properties of soils (15th ed.). Pearson Education.
Doran, J. W., & Zeiss, M. R. (2000). Soil health and sustainability: Managing the biotic component of soil quality. Applied Soil Ecology, 15(1), 3–11. https://doi.org/10.1016/S0929-1393(00)00067-6
FAO. (2018).
The 10 elements of agroecology. Food and Agriculture Organization of the United Nations. https://www.fao.org/agroecology/overview/overview10elements/en/