| reducing the impact of summer cattle grazing on water quality in the sierra nevada mountains of california: a proposal. | the sierra nevada mountain range serves as an important source of drinking water for the state of california. however, summer cattle grazing on federal lands affects the overall water quality yield from this essential watershed as cattle manure is washed into the lakes and streams or directly deposited into these bodies of water. this organic pollution introduces harmful microorganisms and also provides nutrients such as nitrogen and phosphorus which increase algae growth causing eutrophication ... | 2010 | 20154395 |