Although not as dry as at present, the area occupied by the Nabataeans was still a desert and required special techniques for agriculture. One was to contour an area of land into a shallow funnel and to plant a single fruit tree in the middle. Before the 'rainy season', which could easily consist of only one or two rain events, the area around the tree was broken up. When the rain came, all the water that collected in the funnel would flow down toward the fruit tree and sink into the ground. The ground, which was largely loess, would seal up when it got wet and retain the water.