Sharpley, AndrewJarvie, Helen2017-06-082017-06-082012https://hdl.handle.net/1813/51379Point sources of water-quality impairment have been reduced due to their ease of identification and the passage of the Clean Water Act in 1972. However, water-quality problems remain, and as further point-source control becomes less cost effective, attention is being directed towards the role of agricultural nonpoint sources in water-quality degradation. Today, continuing water-quality impairment has led to major initiatives to reduce lossesen-USAttribution-NonCommercial-NoDerivatives 4.0 InternationalAgricultural biotechnologysustainabilityagricultural water usedrought tolerant plantswater qualityricepest controlenvironmental qualitybook chapter