Multiple choice Farmers in the Deccan Plateau use the iron-rich black soil principally to raise tea. sheep. cotton. oranges. Reveal answer Fill a bubble to check yourself C Correct answer Explanation The black soil of the Deccan Plateau, often called regur or black cotton soil, is rich in minerals like iron and is highly retentive of moisture, making it ideal for growing cotton. Cotton is one of the major cash crops cultivated in this region.