Soil fertility is a measure of the soil's capacity to provide essential nutrients and physical support necessary for robust plant growth. This complex property depends on the interplay between chemical composition, biological activity, and physical structure. Key chemical factors include the availability of macronutrients, such as nitrogen, phosphorus, and potassium, and various micronutrients, which are critical for metabolic processes. Biologically, the incorporation of organic matter is vital, as it supports microbial communities responsible for nutrient mineralization and cycling, thereby maintaining soil structure and cation exchange capacity. Physically, appropriate soil texture, porosity, and drainage are necessary to ensure proper aeration and root development, all working together to support sustained plant productivity.