Critical role of physico-chemical attributes in determining soil quality and fertility

Soil is a dynamic and multifunctional natural resource that underpins terrestrial ecosystems and agricultural productivity. Its ability to sustain plant growth and ecosystem services is governed by key physico-chemical properties, including pH, texture, moisture, temperature, electrical conductivity (EC), and soil organic matter (SOM). Soil pH regulates nutrient solubility and microbial processes; texture controls water retention and nutrient-holding capacity; moisture and temperature influence biochemical reactions and plant development; EC reflects soluble salt status; and SOM enhances aggregation, nutrient storage, and biological activity. This review synthesizes the dynamics of essential macronutrients (N, P, K, and S) and micronutrients (Zn and B), emphasizing how their availability and mobility are strongly influenced by soil chemical and physical conditions. Nitrogen transformations are microbially mediated, phosphorus availability depends on organic matter and fixation processes, potassium behavior is linked to clay mineralogy, sulfur mobility is associated with sulfate leaching, and micronutrient availability is highly sensitive to soil pH and texture. The impacts of intensive agricultural practices and excessive agrochemical use on soil degradation and nutrient imbalance are critically discussed. Sustainable approaches such as integrated nutrient management, organic amendments, and biofertilizers are highlighted as effective strategies to restore soil health. Overall, maintaining balanced soil physico-chemical properties is essential for long-term productivity, environmental sustainability, and global food security.