Physical soil fertility is like the structure of a solid foundation, influencing water retention, drainage and root development. Key indicators of physical soil fertility include soil texture, which classifies the proportions of sand, silt and clay. A balanced combination creates an ideal environment for plant roots to navigate. Soil structure, which indicates the arrangement of soil particles, affects water movement and aeration. Good soil structure promotes a friable texture, which facilitates root growth and nutrient uptake. In addition, soil porosity, the measure of open spaces between soil particles, affects water storage and flow. Monitoring these physical indicators is essential to ensure that the soil provides an optimal physical environment that promotes healthy plant growth and overall fertility.