Sulphur is an important nutrient for optimum growth & productivity in Oilseed crops or Pulse crops.

What is the correct answer oilseed crops or pulse crops & why?

Your friend is right.

Sulphur is an important nutrient for optimum growth & productivity of pulse crops.

It is an important element. It plays a role in the synthesis of chlorophyll. It determines the structure of proteins. It plays a role as a part of active centre of some enzymes and affects various metabolic processes.