(Lesson 7. Livestock Water Supply continued) Watering Systems for Livestock. John Jemison, Extension Water Quality Specialist, and  Chris Jones, Agronomist – Natural Resources Conservation Service. UMaine Extension Bulletin #7129. Prescribed Grazing and Feed Management for Lactating Dairy Cows. Karen Sullivan, Robert DeClue, Darrell Emmick. New York State Grazing Lands Conservation Initiative and USDA-NRCS. Jan. 2000.