Micronutrient fertilizers are fertilizers that contain small amounts of essential micronutrients that are required by plants for their growth and development. These micronutrients include iron, manganese, zinc, copper, boron, molybdenum, and chlorine. While plants require these micronutrients in only small quantities, they are still critical to the plant's growth and overall health. For example, iron is essential for chlorophyll synthesis, which is necessary for photosynthesis and overall plant growth. Zinc is important for root development and fruit production, while manganese is required for the metabolism of nitrogen and other nutrients. Micronutrient fertilizers can be applied to plants in various forms, including foliar sprays, soil drenches, or as a component of traditional fertilizer blends. They are especially important in soils that are deficient in these micronutrients or in plants that have a high demand for them. Overuse of micronutrient fertilizers can lead to toxicity in plants, so it is important to use them in the correct quantities and according to the manufacturer's instructions. Soil testing can also help to determine if a particular micronutrient fertilizer is necessary and in what quantity.