Red gram, also known as pigeon pea (Cajanus cajan), is a leguminous crop commonly cultivated in tropical and subtropical regions. It is a staple food in many parts of Asia, Africa, and Latin America, valued for its high protein content. The plant grows as a small, perennial shrub, producing pods that contain seeds rich in proteins, carbohydrates, and essential amino acids. Red gram is also used in crop rotation and intercropping systems due to its ability to fix nitrogen in the soil, improving soil fertility.