Dates from recently excavated Gangetic site of Sakas in Bihar, India, place it at ca.1800–1100 BC. The ceramic and lithic chronologies have been interpreted as Early Farming, Transitional and Chalcolithic/Developed Farming in date. However, depending on where in the Ganges Plains is studied, the time frame of Early, Developed and Advanced Farming periods varies widely, from 7th millennium to 2nd millennium BC and beyond, making the chronological framing of absolute dates within a regional scheme highly complex. In this paper we report the new radiocarbon results from Sakas and note how while these are critical for cementing the absolute dating of the site, until such time as a more stable periodization linked not only to relative and absolute dates but also human lifeways within the different zones of the Ganges plains is created, there remains difficulties in understanding how Sakas and other sites of similar date fit into the changing social, cultural and economic systems in this region.

The spread of agriculture is here examined from the perspective of changes in the composition of archaeobotantical assemblages. We apply multivariate analysis to a large database of plant assemblages from early Neolithic sites across South-West Asia and Europe and show that there are coherent and meaningful changes in their composition over time, to a large extent driven by a reduction in crop-taxa diversity. We interpret these changes as being partly caused by environmental factors, and partly caused by cultural reasons linked to the relatively rapid expansion of Linearbandkeramik (LBK) groups that inhibited diversification of crops until later in the Neolithic.