Archaeological excavations at ancient agricultural sites reveal that there was little homogeneity in the structure and style of buildings in the system irrigation. In other words, most of the irrigation systems found were specific to the particular conditions farmers faced in the region. Ancient farmers probably built according to their individual circumstances, that is, the structure, style and size of the building depended on the proximity to geological surface runoff and/or active floodplains. This feature of Negev desert agriculture suggests that "agricultural systems were constructed in a wide variety of forms highly compatible with local conditions by local farmers and not by a well-designed external government effort." In short, the region's agricultural methods were unique to local conditions and the resources available to individual cultivators without the interference of a centralized system. The dissimilarities between different agricultural sites reflect the wide range of temperature and precipitation differences between the northern and southern parts of the Negev Desert. The unique agricultural facilities allude to the need for ancient farmers to farm according to their individual needs based on location, rainfall, and access to floodplains. However, the Negev Desert was not completely barren and habitable. Archeology suggests that there were