In the map of Rajasthan, shaded area shows the main areas of which crops ?

The shaded region covers the southern and south-eastern districts of Rajasthan—including Udaipur, Chittorgarh, Bhilwara, Banswara, Dungarpur, and Rajsamand—which have red-black and medium-black soils and moderate rainfall suited to maize cultivation. Bajra is grown mainly in the arid and semi-arid western plains, whereas barley and jowar are concentrated more in the eastern and central plains.