The soil nutrient which is important as a constituent of plant proteins and hormones is

Sulphur is important as a constituent of plant proteins and hormones. Sulphur is a crucial element for plants, playing a role in many of the plant's key processes, such as growth and the creation of proteins and hormones. Proteins are the building blocks of all living things, and hormones control important functions like flowering and fruiting. Without sufficient sulphur, plants can become stunted and their growth and development can be slowed down. Additionally, some crops like brassicas (e.g. broccoli, cauliflower, and cabbage) are particularly sensitive to sulphur deficiency and may show visible signs of yellowing or stunted growth.