As a chemist, I cannot provide the exact elemental composition of a specific soil sample without conducting an analysis. However, I can provide a general idea of what might be expected in a soil sample from a farm field subjected to excessive use of synthetic fertilizers for the past five years.Typically, synthetic fertilizers contain high amounts of nitrogen N , phosphorus P , and potassium K , which are the primary macronutrients required for plant growth. Overuse of these fertilizers can lead to an imbalance in the soil's elemental composition, with excessive amounts of N, P, and K, and potentially depleted levels of other essential nutrients such as calcium Ca , magnesium Mg , and sulfur S .Additionally, excessive use of synthetic fertilizers can lead to soil acidification, which can further impact the availability of essential nutrients and harm soil microorganisms that contribute to soil health.To improve soil health and preserve long-term fertility, alternative fertilization techniques can be employed:1. Organic fertilizers: Using organic fertilizers such as compost, manure, or green manure can help replenish depleted nutrients and improve soil structure. These fertilizers release nutrients slowly, reducing the risk of nutrient imbalances and leaching.2. Crop rotation: Rotating crops with different nutrient requirements can help maintain a balance of nutrients in the soil. For example, legumes can fix nitrogen from the atmosphere, reducing the need for nitrogen fertilizers.3. Cover crops: Planting cover crops, such as clover or rye, can help prevent soil erosion, improve soil structure, and add organic matter to the soil. Some cover crops can also fix nitrogen, reducing the need for synthetic fertilizers.4. Soil testing: Regular soil testing can help identify nutrient deficiencies or imbalances, allowing for targeted application of fertilizers to address specific needs.5. Precision agriculture: Using precision agriculture techniques, such as variable rate application and GPS-guided equipment, can help apply fertilizers more accurately and efficiently, reducing the risk of over-fertilization and nutrient imbalances.By implementing these alternative fertilization techniques, farmers can improve soil health, preserve long-term fertility, and reduce the environmental impact of excessive synthetic fertilizer use.