Petroleum and natural gas are major sources of revenue in Texas. However, disturbance caused by construction of drilling locations, oilfield roads, and installation of pipelines can result in reduced crop production, increased susceptibility of the damaged sites to erosion, and increases in noxious and poisonous plant densities. In addition, on-site disposal of drilling fluids used in the drilling process can create problems if not managed properly. Drilling fluids have been and currently are land applied in many parts of Texas. In some areas, the use of clayey drilling fluids on sandy soils has improved water holding capacity and plant growth. However, in many areas of the state, improper rates of application of high salt drilling fluids have resulted in the death of plants and severely damaged soils that have failed to recover even after many decades.