The use of soil conservation practices such as crop rotation, cover crops, and windbreaks was expanded following the drought experiences of the dirty thirties. Literally layers and layers of topsoil would be blowing away during this time. Bow River Irrigation Project, Red Deer River Project and the St. Mary Irrigation project of Alberta, were a few of the major projects undertaken by the Prairie Farm Rehabilitation Act (P.F.R.A.) resulting in reservoirs, and distribution systems. A current project is soil liming at the Land Resource Research Institute.