From the article
"Understanding the interplay between subsistence systems and settlement patterns is crucial for interpretation of past economies and culture change. The Late Harappan (1900-1700 BCE) in Gujarat, India, witnessed a significant increase in the number of settlements in the arid regions. This increase has been ascribed to shifts in land use patterns resulting from an increased emphasis on pastoral husbandry and the adoption of drought resistant summer crops, i.e., millets. This issue will be addressed using data from archaeobotanical and ethnographic studies complemented by carbon isotope analysis of cattle bones from the Late Harappan site of Oriyo Timbo, Gujarat."
Chapter 10 of Harappa Excavation Reports 1986-1990