Over the past three decades there have been increased efforts toward reduction in nutrient and sediment loss from agricultural lands. This is due mainly to the fact that since passage of the Clean Water Act in 1972, point sources of pollution have accounted for progressively smaller portions of water quality problems in the nation. Agriculture now remains a key source of nonpoint source pollutants, chiefly sediment, nitrogen and phosphorus loads to downstream waters. To address water quality issues related to livestock agriculture, a multidisciplinary project titled “Livestock and the Environment: National Pilot Project” (NPP) was initiated by the Texas Institute for Applied Environmental Research (TIAER) in 1992. An important part [...]