Concerns about the impact of farm production on the quality of the Nation's drinking and recreational water resources have risen over the past 10 years. Because point sources of pollution were controlled first, agricultural nonpoint sources have become the Nation's largest remaining single...

Water is indispensable for the existence and survival of life on earth. With the advancement of civilization, water has found in the large and progressively increasing list of uses. Water is needed in almost every sphere of human activity. Water is the key component for survival and to provide...