Manganese(II) sulfate tetrahydrate is widely used in agriculture as a micronutrient fertilizer to correct manganese deficiencies in soil. It promotes healthy plant growth, particularly in crops like cereals, legumes, and fruits, by aiding in photosynthesis and enzyme activation. In animal husbandry, it is added to livestock feed to support bone development and metabolic functions. Industrially, it serves as a precursor in the production of other manganese compounds and is utilized in the manufacture of dry-cell batteries, ceramics, and paints. Additionally, it plays a role in water treatment processes to remove impurities and improve water quality.