Ferrous sulphate is a crystalline compound that occurs naturally in minerals or can be produced synthetically. It consists of iron and sulphate ions, making it an excellent source of iron for plants. Iron is an essential micronutrient that plays a crucial role in various physiological processes, including chlorophyll formation, photosynthesis, and enzyme function. Deficiencies in iron can lead to chlorosis, which is characterized by yellowing leaves, stunted growth, and reduced yields.