Soil nutrition refers to the essential nutrients found in soil that support plant growth. These nutrients include macronutrients like nitrogen, phosphorus, and potassium, which are needed in larger amounts, as well as micronutrients such as iron, manganese, and zinc, required in smaller quantities. Healthy soil provides a balanced mix of these nutrients, ensuring plants can thrive. Soil nutrition is influenced by factors like organic matter, pH levels, and microbial activity. Organic matter improves soil structure and nutrient retention, while pH affects nutrient availability. Regular testing and proper management practices can help maintain optimal soil nutrition for sustainable agriculture and gardening.