The Cambridge History of India, Vol. I: Ancient India v1.c15.84

v1.c15.84

Thus in the part of India which lies immediately east, north-east, and north of Bombay the lowlands and the uplands are alike fertile—the lowlands round Ahmadābād and Baroda, and in the valleys of the Narbadā and Tāpti rivers, because of their alluvial soil, and the uplands round Poona and Indore because they are clothed with the volcanic cotton soil.