Impact of Salinity Stress on Soil Quality and Crop Productivity: Mitigation Approaches

Abstract

Soil salinity is one of the most serious forms of land degradation affecting agricultural productivity worldwide. It results from the accumulation of soluble salts in the root zone due to natural processes, excessive irrigation, poor drainage, seawater intrusion, and changing climatic conditions. Salinity stress adversely affects soil physical, chemical, and biological properties by reducing soil permeability, nutrient availability, microbial activity, and water infiltration. High salt concentrations create osmotic stress and ion toxicity, limiting plant water uptake, disturbing nutrient balance, and impairing physiological and biochemical processes essential for crop growth. Consequently, salinity significantly reduces seed germination, plant development, crop yield, and product quality, posing a major challenge to global food security. Effective mitigation of soil salinity requires integrated management approaches that combine improved irrigation practices, drainage systems, salt-tolerant crop varieties, soil amendments, biofertilizers, conservation agriculture, and precision farming technologies. Advances in Geographic Information Systems (GIS), Remote Sensing (RS), Internet of Things (IoT), artificial intelligence, and digital soil monitoring have enhanced the assessment and management of saline soils by enabling real-time monitoring and site-specific interventions. This paper examines the mechanisms of salinity stress, evaluates its effects on soil quality and crop productivity, discusses various mitigation approaches for sustainable salinity management, and highlights emerging technologies and future strategies to improve agricultural resilience and ensure long-term food security under changing climatic conditions..