CALCIUM AND MAGNESIUM 1 CONSERVATION Agriculture for Carbon Sequestration and Sustaining Soil Health 1 ESSENTIAL PLANT NUTRIENTS 1 Geographic information systems in soil degradation, remote sensing applications to soil degradation assessments 1 Mapping soil degradation, revisiting the glasod methodology, dessertification assessment, agronomic impact of soil degradation, on-site and off-site costs of soil degradation, on-farm economic costs of erosion, 1 NITROGEN, PHOSPHORUS, POTASSIUM AND SULFER 1 ORGANIC MATTER 1 SOIL ACIDITY 1 SOIL COLLOIDS 1 SOIL SALINITY AND SODICITY 1 SOIL, SUSTAINER 1 Soil quality and sustainability, soil degradation, erosion, soil crusting, hardsetting, surface sealing, soil compaction, soil organic matter, acidification, sodic soils. soil pollution, acid sulfate soils, soil degradation assessments 1 methods for assessing the impacts of soil degradation on water quality 1