trace of agriculture

van Driem's "Tibeto-Burma vs Indo-Chinese (in Sagart et al. "The
peopling of East Asia" traces agriculture branching out with various
etnolinguistic groups in East Asia. The one that should interest
PIEists is this archaeological sequence:

Sichuan Mesolithic and Neolithic (11500 - 2000 BC) ->
Dadiwan Neolithic (Gansu & Shanxi) (6500 - 5200 BC) ->
Majiayao Neolithic (ibd.) (3900 - 1800 BC) ->
Northern Neolithic (Kashmir) (2500 - 1700 BC)

where the story ends as far as he is concerned. It is the closest
early agriculture gets to PIE. Does that mean agriculture is not
native to PIE? If so, at least something did go out-of-India.

Can anyone here continue the tale?


Torsten