The Southern Plains Tradition began around 800 AD and extended to the historic period. It generally occupies the areas of Nebraska, Kansas, Oklahoma, and Texas. The housing in the Southern Plains varied by location. In Kansas the people here made use of oval, square, and rectangular shaped frame-and-daub houses. While in Oklahoma they inhabited semi-subterranean houses which were more like the Central Plains Tradition houses. Village construction varied by location. In the Turkey Creek phase villages were generally built along tributaries. Their houses were approximately 16 by 14 feet with 4 posts and no interior storage for surplus food. In the Washita Phase their villages were built up on terraces. The size of these villages was up to 15 acres and may have contained as many as 20 houses. They were rectangular houses that were 20-30 feet long and 16-26 feet wide. There were many external storage pits utilized during this phase, as well as one storage pit per dwelling. Archaeological evidence found at the various sites show a dependence on agriculture, as well as bison hunting. They made use of crops such as maize, beans, squash, and pumpkins. Other evidence of agriculture includes bison bone tools used for farming and grinding stones used to process their crops.
http://twist.lib.uiowa.edu/plains/plainsvillage.html