In the vicinity of some residential sites there are the remains of agricultural terracing and irrigation channels. Walls bounding long abandoned arable parcels (zhingsa) are common in western Tibet (including sites A-13, A-42, A-60, A-62, A-87, A-89, A-101, A-106, A-125, A-126, B-50, B-79, B-81, etc.). These former agricultural enclaves are commonly attributed to the ancient Mön, who are supposed to have cultivated large areas of what is now only pasturage. At many erstwhile agrarian sites in western Tibet, all perennial sources of water have dried up. Defunct agricultural holdings are also evident on the shores of Dangra Yutso, in the central Jangtang (including sites B-4, B-6, B-55, B-57, B-58, B-59, etc.). Some of these Lake Dangra sites are attributed, in the local oral tradition, to the prehistoric Zhang Zhung kingdom. The Lungön site (G-3) is especially noteworthy because the water it carried from deep inside the Lungön Valley flowed to Dangra Khyungdzong (A-5) a fabled capital of Zhang Zhung.

In the face of appreciable geographical evidence, the legends circulating in Upper Tibet (west of the 87th meridian) that tell of much more widely practiced agriculture in ancient times, are undoubtedly based on an authentic collective memory. Rutok, Gugé, and Gar, in particular, were very much more heavily farmed in the past. These former arable lands are frequently encountered in proximity to ruined villages and citadels, many of which now lie totally deserted. One implication of larger locally produced grain reserves is that they may have been used to sustain larger populations. The oral traditions of Rutok claim so much, stating that this district in ancient times supported upwards of 100,000 people, ten times the current population.¹ While such legends are hyperbolic, they do seem to preserve an authentic memory of a more developed past in parts of Upper Tibet.