Ferrous sulfate (chemical formula FeSO4) has the following main uses in agriculture:
1.Nutrient supplementation: Ferrous sulfate is a compound containing iron and sulfur, which can be used as trace elements in fertilizers to supply plants. Iron is one of the trace elements necessary for plant growth and development. It plays an important role in the processes of photosynthesis, chlorophyll production and respiration of plants. Ferrous sulfate can effectively supplement the lack of iron in the soil and promote the growth and yield of plants.

2.Foliar fertilization: Ferrous sulfate can provide the iron and sulfur elements needed by plants through foliar spraying. Because foliar spraying can directly supply the nutrients needed by plants and absorb them quickly, it can quickly adjust the nutritional status of plants and improve chlorophyll synthesis and plant growth.
3.Soil improvement: Ferrous sulfate can also be used for soil improvement and regulation. Ferrous sulfate is acidic, which can reduce the pH value of the soil and improve the alkalinization of acidic soil. In addition, ferrous sulfate in soil can promote the decomposition rate of organic matter, increase soil fertility and water retention capacity.